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Falken ZIEX ZE310 EcoRun vs Michelin Primacy 4 Plus

This head-to-head pits two summer premium-touring staples against each other: Falken's ZIEX ZE310 EcoRun and Michelin's Primacy 4 Plus. Across seven shared professional tests from 2023-2024 in common family-car sizes, the Michelin consistently scores higher overall (6 overall wins vs. 1), underpinned by strong wet and dry braking, low noise, excellent efficiency, and standout longevity.

The Falken counters with notably strong aquaplaning resistance, competitive wet handling in some tests, reassuring comfort, and a far lower purchase price. Rolling resistance swings between tests, but long-term wear and fuel use clearly favor the Michelin. If you value outright safety margins and total cost of ownership, the Primacy 4 Plus sets a high bar; if upfront cost and aquaplaning security matter most, the ZE310 EcoRun makes a compelling, budget-friendlier case.
ZIEX-ZE310-EcoRun VS Primacy-4-Plus

Test Results

Independent comparison tire tests are the best source of data to get tire information from, and the good news is there have been seven tests which compare both tires directly!

Summary of seven total tests comparing both tires directly
TireTest WinsPerformance
Falken ZIEX ZE310 EcoRunone
one wins
Michelin Primacy 4 Plussix
six wins

While it might look like the Michelin Primacy 4 Plus is better than the Falken ZIEX ZE310 EcoRun purely based on the higher number of test wins, tires are very complicated objects which means where one tire is better than the other can be more important in real world use.

Let's look at how the two tires compare across multiple tire test categories.

Key Strengths

  • Excellent aquaplaning resistance (straight and curved) across multiple tests
  • Comfortable ride with strong subjective comfort scores
  • Occasional wins in wet handling and subjective dry handling
  • Significantly lower purchase price
  • Consistently shorter wet and dry braking distances
  • Very high mileage and low wear rates
  • Low noise and good rolling efficiency/fuel consumption
  • Balanced, secure handling with strong overall test results

Dry Braking

Looking at data from seven tire tests, the Michelin Primacy 4 Plus was better during seven dry braking tests. On average the Michelin Primacy 4 Plus stopped the vehicle in 1.11% less distance than the Falken ZIEX ZE310 EcoRun.

Falken ZIEX ZE310 EcoRun
36.84M
Michelin Primacy 4 Plus
36.43M
Dry braking in meters, lower is better

Best In Dry Braking: Michelin Primacy 4 Plus

Falken ZIEX ZE310 EcoRun
36.7M (+0.12M)
Michelin Primacy 4 Plus
36.58M
Falken ZIEX ZE310 EcoRun
37.4M (+0.5M)
Michelin Primacy 4 Plus
36.9M
Falken ZIEX ZE310 EcoRun
36.5M (+0.2M)
Michelin Primacy 4 Plus
36.3M
Falken ZIEX ZE310 EcoRun
37.7M (+0.4M)
Michelin Primacy 4 Plus
37.3M
Falken ZIEX ZE310 EcoRun
36.5M (+0.2M)
Michelin Primacy 4 Plus
36.3M
Falken ZIEX ZE310 EcoRun
34.3M (+0.7M)
Michelin Primacy 4 Plus
33.6M
Falken ZIEX ZE310 EcoRun
38.8M (+0.8M)
Michelin Primacy 4 Plus
38M

Dry Handling [s]

Looking at data from two tire tests, the Falken ZIEX ZE310 EcoRun was better during one dry handling [s] tests. On average the Falken ZIEX ZE310 EcoRun was 0.43% faster around a lap than the Michelin Primacy 4 Plus.

Falken ZIEX ZE310 EcoRun
64.22s
Michelin Primacy 4 Plus
64.5s
Dry handling time in seconds, lower is better

Best In Dry Handling [s]: Falken ZIEX ZE310 EcoRun

Falken ZIEX ZE310 EcoRun
52.04s
Michelin Primacy 4 Plus
52.6s (+0.56s)
Falken ZIEX ZE310 EcoRun
76.4s
Michelin Primacy 4 Plus
76.4s

Dry Handling [Km/H]

Looking at data from two tire tests, the Falken ZIEX ZE310 EcoRun was better during one dry handling [km/h] tests. On average the Falken ZIEX ZE310 EcoRun was 0.31% faster around a lap than the Michelin Primacy 4 Plus.

Falken ZIEX ZE310 EcoRun
97.25Km/H
Michelin Primacy 4 Plus
96.95Km/H
Dry Handling Average Speed, higher is better

Best In Dry Handling [Km/H]: Falken ZIEX ZE310 EcoRun

Falken ZIEX ZE310 EcoRun
116.2Km/H
Michelin Primacy 4 Plus
115.1Km/H (-1.1Km/H)
Falken ZIEX ZE310 EcoRun
78.3Km/H (-0.5Km/H)
Michelin Primacy 4 Plus
78.8Km/H

Subj. Dry Handling

Looking at data from one tire tests, the Falken ZIEX ZE310 EcoRun was better during one subj. dry handling tests. On average the Falken ZIEX ZE310 EcoRun scored 5.56% more points than the Michelin Primacy 4 Plus.

Falken ZIEX ZE310 EcoRun
90 Points
Michelin Primacy 4 Plus
85 Points
Subjective Dry Handling Score, higher is better

Best In Subj. Dry Handling: Falken ZIEX ZE310 EcoRun

Falken ZIEX ZE310 EcoRun
90 Points
Michelin Primacy 4 Plus
85 Points (-5 Points)

Wet Braking

Looking at data from seven tire tests, the Michelin Primacy 4 Plus was better during six wet braking tests. On average the Michelin Primacy 4 Plus stopped the vehicle in 0.75% less distance than the Falken ZIEX ZE310 EcoRun.

Falken ZIEX ZE310 EcoRun
37.21M
Michelin Primacy 4 Plus
36.93M
Wet braking in meters, lower is better

Best In Wet Braking: Michelin Primacy 4 Plus

Falken ZIEX ZE310 EcoRun
33.88M (+1M)
Michelin Primacy 4 Plus
32.88M
Falken ZIEX ZE310 EcoRun
36.8M (+0.1M)
Michelin Primacy 4 Plus
36.7M
Falken ZIEX ZE310 EcoRun
28M (+0.3M)
Michelin Primacy 4 Plus
27.7M
Falken ZIEX ZE310 EcoRun
32.6M (+1.5M)
Michelin Primacy 4 Plus
31.1M
Falken ZIEX ZE310 EcoRun
43.7M (+0.4M)
Michelin Primacy 4 Plus
43.3M
Falken ZIEX ZE310 EcoRun
43.2M
Michelin Primacy 4 Plus
44.6M (+1.4M)
Falken ZIEX ZE310 EcoRun
42.3M (+0.1M)
Michelin Primacy 4 Plus
42.2M

Wet Braking - Concrete

Looking at data from two tire tests, the Falken ZIEX ZE310 EcoRun was better during two wet braking - concrete tests. On average the Falken ZIEX ZE310 EcoRun stopped the vehicle in 3.61% less distance than the Michelin Primacy 4 Plus.

Falken ZIEX ZE310 EcoRun
36.05M
Michelin Primacy 4 Plus
37.4M
Wet braking on Concrete in meters, lower is better

Best In Wet Braking - Concrete: Falken ZIEX ZE310 EcoRun

Falken ZIEX ZE310 EcoRun
35.8M
Michelin Primacy 4 Plus
37.7M (+1.9M)
Falken ZIEX ZE310 EcoRun
36.3M
Michelin Primacy 4 Plus
37.1M (+0.8M)

Wet Handling [s]

Looking at data from two tire tests, the Falken ZIEX ZE310 EcoRun was better during one wet handling [s] tests. On average the Falken ZIEX ZE310 EcoRun was 0.44% faster around a wet lap than the Michelin Primacy 4 Plus.

Falken ZIEX ZE310 EcoRun
82.89s
Michelin Primacy 4 Plus
83.26s
Wet handling time in seconds, lower is better

Best In Wet Handling [s]: Falken ZIEX ZE310 EcoRun

Falken ZIEX ZE310 EcoRun
86.58s (+0.86s)
Michelin Primacy 4 Plus
85.72s
Falken ZIEX ZE310 EcoRun
79.2s
Michelin Primacy 4 Plus
80.8s (+1.6s)

Wet Handling [Km/H]

Looking at data from two tire tests, the Michelin Primacy 4 Plus was better during one wet handling [km/h] tests. On average the Michelin Primacy 4 Plus was 0.7% faster around a wet lap than the Falken ZIEX ZE310 EcoRun.

Falken ZIEX ZE310 EcoRun
70.85Km/H
Michelin Primacy 4 Plus
71.35Km/H
Wet Handling Average Speed, higher is better

Best In Wet Handling [Km/H]: Michelin Primacy 4 Plus

Falken ZIEX ZE310 EcoRun
74.5Km/H
Michelin Primacy 4 Plus
74.5Km/H
Falken ZIEX ZE310 EcoRun
67.2Km/H (-1Km/H)
Michelin Primacy 4 Plus
68.2Km/H

Subj. Wet Handling

Looking at data from one tire tests, the Falken ZIEX ZE310 EcoRun and Michelin Primacy 4 Plus performed equally well in subj. wet handling tests.

Falken ZIEX ZE310 EcoRun
95 Points
Michelin Primacy 4 Plus
95 Points
Subjective Wet Handling Score, higher is better

Best In Subj. Wet Handling: Both tires performed equally well

Falken ZIEX ZE310 EcoRun
95 Points
Michelin Primacy 4 Plus
95 Points

Wet Circle

Looking at data from one tire tests, the Michelin Primacy 4 Plus was better during one wet circle tests. On average the Michelin Primacy 4 Plus had 1.76% higher lateral wet grip than the Falken ZIEX ZE310 EcoRun.

Falken ZIEX ZE310 EcoRun
6.13m/s
Michelin Primacy 4 Plus
6.24m/s
Lateral wet grip in m/s squared, higher is better

Best In Wet Circle: Michelin Primacy 4 Plus

Falken ZIEX ZE310 EcoRun
6.13m/s (-0.11m/s)
Michelin Primacy 4 Plus
6.24m/s

Straight Aqua

Looking at data from six tire tests, the Michelin Primacy 4 Plus was better during three straight aqua tests. On average the Michelin Primacy 4 Plus floated at a 0.94% higher speed than the Falken ZIEX ZE310 EcoRun.

Falken ZIEX ZE310 EcoRun
81.95Km/H
Michelin Primacy 4 Plus
82.73Km/H
Float Speed in Km/H, higher is better

Best In Straight Aqua: Michelin Primacy 4 Plus

Falken ZIEX ZE310 EcoRun
78.92Km/H
Michelin Primacy 4 Plus
78.18Km/H (-0.74Km/H)
Falken ZIEX ZE310 EcoRun
79.7Km/H (-3.8Km/H)
Michelin Primacy 4 Plus
83.5Km/H
Falken ZIEX ZE310 EcoRun
77.4Km/H
Michelin Primacy 4 Plus
75.3Km/H (-2.1Km/H)
Falken ZIEX ZE310 EcoRun
83.4Km/H (-1.8Km/H)
Michelin Primacy 4 Plus
85.2Km/H
Falken ZIEX ZE310 EcoRun
79.2Km/H (-2.7Km/H)
Michelin Primacy 4 Plus
81.9Km/H
Falken ZIEX ZE310 EcoRun
93.1Km/H
Michelin Primacy 4 Plus
92.3Km/H (-0.8Km/H)

Curved Aquaplaning

Looking at data from five tire tests, the Falken ZIEX ZE310 EcoRun was better during three curved aquaplaning tests. On average the Falken ZIEX ZE310 EcoRun slipped out at a 3.7% higher speed than the Michelin Primacy 4 Plus.

Falken ZIEX ZE310 EcoRun
5.67m/sec2
Michelin Primacy 4 Plus
5.46m/sec2
Remaining lateral acceleration, higher is better

Best In Curved Aquaplaning: Falken ZIEX ZE310 EcoRun

Falken ZIEX ZE310 EcoRun
3.56m/sec2
Michelin Primacy 4 Plus
3.42m/sec2 (-0.14m/sec2)
Falken ZIEX ZE310 EcoRun
3.5m/sec2 (-0.1m/sec2)
Michelin Primacy 4 Plus
3.6m/sec2
Falken ZIEX ZE310 EcoRun
3.3m/sec2
Michelin Primacy 4 Plus
2.9m/sec2 (-0.4m/sec2)
Falken ZIEX ZE310 EcoRun
4.77m/sec2 (-0.02m/sec2)
Michelin Primacy 4 Plus
4.79m/sec2
Falken ZIEX ZE310 EcoRun
13.2m/sec2
Michelin Primacy 4 Plus
12.6m/sec2 (-0.6m/sec2)

Subj. Comfort

Looking at data from one tire tests, the Falken ZIEX ZE310 EcoRun was better during one subj. comfort tests. On average the Falken ZIEX ZE310 EcoRun scored 5% more points than the Michelin Primacy 4 Plus.

Falken ZIEX ZE310 EcoRun
100 Points
Michelin Primacy 4 Plus
95 Points
Subjective Comfort Score, higher is better

Best In Subj. Comfort: Falken ZIEX ZE310 EcoRun

Falken ZIEX ZE310 EcoRun
100 Points
Michelin Primacy 4 Plus
95 Points (-5 Points)

Noise

Looking at data from five tire tests, the Michelin Primacy 4 Plus was better during four noise tests. On average the Michelin Primacy 4 Plus measured 1.14% quieter than the Falken ZIEX ZE310 EcoRun.

Falken ZIEX ZE310 EcoRun
72.02dB
Michelin Primacy 4 Plus
71.2dB
External noise in dB, lower is better

Best In Noise: Michelin Primacy 4 Plus

Falken ZIEX ZE310 EcoRun
71.6dB (+1.3dB)
Michelin Primacy 4 Plus
70.3dB
Falken ZIEX ZE310 EcoRun
71.9dB (+1.4dB)
Michelin Primacy 4 Plus
70.5dB
Falken ZIEX ZE310 EcoRun
71.4dB (+0.7dB)
Michelin Primacy 4 Plus
70.7dB
Falken ZIEX ZE310 EcoRun
73.7dB (+1dB)
Michelin Primacy 4 Plus
72.7dB
Falken ZIEX ZE310 EcoRun
71.5dB
Michelin Primacy 4 Plus
71.8dB (+0.3dB)

Noise

Looking at data from one tire tests, the Michelin Primacy 4 Plus was better during one noise tests. On average the Michelin Primacy 4 Plus measured 1.41% quieter than the Falken ZIEX ZE310 EcoRun.

Falken ZIEX ZE310 EcoRun
71dB
Michelin Primacy 4 Plus
70dB
Internal noise in dB, lower is better

Best In Noise: Michelin Primacy 4 Plus

Falken ZIEX ZE310 EcoRun
71dB (+1dB)
Michelin Primacy 4 Plus
70dB

Tire Weight

Looking at data from one tire tests, the Michelin Primacy 4 Plus was better during one tire weight tests. On average the Michelin Primacy 4 Plus weighed 4.44% less than the Falken ZIEX ZE310 EcoRun.

Falken ZIEX ZE310 EcoRun
9Kg
Michelin Primacy 4 Plus
8.6Kg
Tire Weight Per Set, lower is better

Best In Tire Weight: Michelin Primacy 4 Plus

Falken ZIEX ZE310 EcoRun
9Kg (+0.4Kg)
Michelin Primacy 4 Plus
8.6Kg

Wear

Looking at data from three tire tests, the Michelin Primacy 4 Plus was better during three wear tests. On average the Michelin Primacy 4 Plus is predicted to cover 29.68% miles before reaching 1.6mm than the Falken ZIEX ZE310 EcoRun.

Falken ZIEX ZE310 EcoRun
37633.33KM
Michelin Primacy 4 Plus
53516.67KM
Predicted tread life in KM, higher is better

Best In Wear: Michelin Primacy 4 Plus

Falken ZIEX ZE310 EcoRun
40800KM (-20500KM)
Michelin Primacy 4 Plus
61300KM
Falken ZIEX ZE310 EcoRun
46300KM (-14000KM)
Michelin Primacy 4 Plus
60300KM
Falken ZIEX ZE310 EcoRun
25800KM (-13150KM)
Michelin Primacy 4 Plus
38950KM

Value

Looking at data from one tire tests, the Falken ZIEX ZE310 EcoRun was better during one value tests. On average the Falken ZIEX ZE310 EcoRun has a 5.63% better value based on dollars per 1000 warranted miles than the Michelin Primacy 4 Plus.

Falken ZIEX ZE310 EcoRun
2.85Price/1000
Michelin Primacy 4 Plus
3.02Price/1000
Dollars/1000 miles based on mileage warranty, lower is better

Best In Value: Falken ZIEX ZE310 EcoRun

Falken ZIEX ZE310 EcoRun
2.85Price/1000
Michelin Primacy 4 Plus
3.02Price/1000 (+0.17Price/1000)

Price

Looking at data from four tire tests, the Falken ZIEX ZE310 EcoRun was better during four price tests. On average the Falken ZIEX ZE310 EcoRun cost 26.98% less than the Michelin Primacy 4 Plus.

Falken ZIEX ZE310 EcoRun
152.6
Michelin Primacy 4 Plus
208.97
Price in local currency, lower is better

Best In Price: Falken ZIEX ZE310 EcoRun

Falken ZIEX ZE310 EcoRun
89.39
Michelin Primacy 4 Plus
93.89 (+4.5)
Falken ZIEX ZE310 EcoRun
89
Michelin Primacy 4 Plus
120 (+31)
Falken ZIEX ZE310 EcoRun
132
Michelin Primacy 4 Plus
182 (+50)
Falken ZIEX ZE310 EcoRun
300
Michelin Primacy 4 Plus
440 (+140)

Rolling Resistance

Looking at data from four tire tests, the Michelin Primacy 4 Plus was better during three rolling resistance tests. On average the Michelin Primacy 4 Plus had a 4.14% lower rolling resistance than the Falken ZIEX ZE310 EcoRun.

Falken ZIEX ZE310 EcoRun
8.46kg / t
Michelin Primacy 4 Plus
8.11kg / t
Rolling resistance in kg t, lower is better

Best In Rolling Resistance: Michelin Primacy 4 Plus

Falken ZIEX ZE310 EcoRun
8.72kg / t (+0.48kg / t)
Michelin Primacy 4 Plus
8.24kg / t
Falken ZIEX ZE310 EcoRun
8.22kg / t (+0.06kg / t)
Michelin Primacy 4 Plus
8.16kg / t
Falken ZIEX ZE310 EcoRun
8.9kg / t (+1.3kg / t)
Michelin Primacy 4 Plus
7.6kg / t
Falken ZIEX ZE310 EcoRun
8kg / t
Michelin Primacy 4 Plus
8.42kg / t (+0.42kg / t)

Fuel Consumption

Looking at data from two tire tests, the Michelin Primacy 4 Plus was better during two fuel consumption tests. On average the Michelin Primacy 4 Plus used 2.52% less fuel than the Falken ZIEX ZE310 EcoRun.

Falken ZIEX ZE310 EcoRun
5.95l/100km
Michelin Primacy 4 Plus
5.8l/100km
Fuel consumption in Litres per 100 km, lower is better

Best In Fuel Consumption: Michelin Primacy 4 Plus

Falken ZIEX ZE310 EcoRun
5.9l/100km (+0.1l/100km)
Michelin Primacy 4 Plus
5.8l/100km
Falken ZIEX ZE310 EcoRun
6l/100km (+0.2l/100km)
Michelin Primacy 4 Plus
5.8l/100km

Abrasion

Looking at data from two tire tests, the Michelin Primacy 4 Plus was better during two abrasion tests. On average the Michelin Primacy 4 Plus emitted 31.08% less particle wear matter than the Falken ZIEX ZE310 EcoRun.

Falken ZIEX ZE310 EcoRun
73.85mg/km/t
Michelin Primacy 4 Plus
50.9mg/km/t
Weight of Tire Wear Particles Lost (mg/km/t), lower is better

Best In Abrasion: Michelin Primacy 4 Plus

Falken ZIEX ZE310 EcoRun
75.7mg/km/t (+22mg/km/t)
Michelin Primacy 4 Plus
53.7mg/km/t
Falken ZIEX ZE310 EcoRun
72mg/km/t (+23.9mg/km/t)
Michelin Primacy 4 Plus
48.1mg/km/t

Real World Driver Reviews

Falken ZIEX ZE310 EcoRun Driver Reviews

Across 104 reviews, the Falken ZIEX ZE310 EcoRun is most often described as a strong value summer tire with confident wet and dry grip (including good aquaplaning resistance) and notably low road noise. Many drivers also praise its predictable, safe handling and generally good wear for the money, with a high rate of repeat purchases. The main recurring downside is higher rolling resistance leading to increased fuel consumption, and some users note a softer sidewall/less sharp steering response that makes it feel less sporty or a bit vague when pushed.

Based on 113 reviews with an average rating of 80%

Michelin Primacy 4 Plus Driver Reviews

Most drivers rate the Michelin Primacy 4 Plus highly for quiet, comfortable touring manners with strong wet and dry grip and confident braking, often noting improved stability versus previous tires. High-scoring reviews frequently praise low noise, comfort, and good wear. A minority report issues: noticeable road noise on rough surfaces, weaker steering precision versus sport tires, and occasional wet/cold grip criticism. Overall, the Primacy 4 Plus is a well-liked premium touring tire with comfort and wet safety as standouts.

Based on 34 reviews with an average rating of 80%

Best Review for the Falken ZIEX ZE310 EcoRun
Given 78% 195/65 R15 H on a combination of roads for 500 average miles
New silica and new model tire. I have bought them a few days ago.
Very silent. Most silent tires I had the last 20 years.
Nice handling.

Cheaper than most other brands.
(30euro cheaper than dunlop and 50 euro cheaper than michelin)

Euro label - C A A 67db for 195 65 15
Helpful 1266 - tire reviewed on March 9, 2018
View all Falken ZIEX ZE310 EcoRun driver reviews >>
Best Review for the Michelin Primacy 4 Plus
Given 97% 235/45 R17 on a combination of roads for 1,000 average miles
Coming from the Civics original tires Primacy 3 that’s lasted 25Kmls or just over 4 years, I don’t do a lot of miles daily but those Primacy 3 tires served me well with just the road noise being a little loud at times I liked the dry, wet, handling and comfort of these Michelin’s.

So with not a lot of info on the new Primacy 4Plus and needing 4tires I decided to go with these anyway as only £1.oo each dearer than the primacy 4 when I purchased, in for a penny in for a pound, these are the XL reinforced version I went for as they are a whole 1DB quieter than the non XL... Continue reading this review using the link below
Helpful 1492 - tire reviewed on July 24, 2022
View all Michelin Primacy 4 Plus driver reviews >>

Conclusion

Across multiple independent tests, Michelin Primacy 4 Plus establishes a clear pattern: reliably shorter braking on wet and dry roads, lower noise, better fuel efficiency, and dramatically longer tread life (often ~30-50% more mileage). That combination yields higher overall rankings and a stronger safety and value story over the full life of the tire despite the higher purchase price.

Falken ZIEX ZE310 EcoRun impresses with very good straight and curved aquaplaning resistance, occasional wins in wet handling and subjective comfort, and a significantly lower price. However, it trails the Michelin in critical stop-distance metrics and durability. For most drivers prioritizing all-weather safety feel, quietness, economy, and longevity, choose the Michelin. If you drive mainly in heavy rain, value aquaplaning security, and want to minimize upfront spend, the Falken is the savvy pick.
Key Differences
  • Braking performance: Michelin repeatedly stops shorter in both wet and dry; Falken is average to good but usually behind.
  • Aquaplaning: Falken often resists aquaplaning better (straight and curved), giving higher rain-margin confidence.
  • Longevity: Michelin delivers substantially longer tread life (often 30-50%+ advantage).
  • Noise/comfort: Both are comfortable; Michelin measures quieter more often, while Falken scores high in subjective comfort.
  • Efficiency: Michelin generally has lower rolling resistance and fuel use; Falken shows higher RR in several tests.
  • Price/value framing: Falken is markedly cheaper to buy; Michelin's higher price is offset by better wear and lower fuel use over time.
Michelin Primacy 4 Plus

Overall Winner: Michelin Primacy 4 Plus

Based on the tire test data and user reviews we have in our database, the Michelin Primacy 4 Plus has demonstrated better overall performance in this comparison. However, as you can see from the spider diagram above, each tire has its own strengths which should be considered in your final tire buying choice.

Similar Comparisons

Looking for more tire comparisons? Here are other direct comparisons involving these tires:

Footnote

This page has been developed using tire industry testing best practices. This means we are only comparing tests which have had both tires in the same test.

Why is this important? Tire testing is heavily affected by things like surface grip levels and surface temperature, which means you can only compare values from the same day. During a tire test external condition changes are calculated into the overall results, but it is not possible to calculate this between tire tests performed on different days or at different locations.

As a result you will see other tests on Tire Reviews which feature both the %s and %s, but as they weren't conducted on the same day, the results are not comparable.

Lots of other websites do this sort of tire comparison, Tire Reviews doesn't.