THIS DATA IS BASED ON INTERNAL MICHELIN TESTING.

Now that's clearly out of the way, I think it's quite an interesting datapoint. I'm confident the data will be good as when companies put competitor data in the public eye, they risk being sued over it, so they triple check everything is fair.

Notes on the data below. 

The Goodyear® Assurance® WeatherReady® has already been replaced with the WeatherReady 2. The wet braking and snow traction were performed on tyres buffed down to 3/32", and the traction results are a percentage based result compared to a standard reference tyre, so ignore the fact it says pulling force in newtons. Basically, higher is better.

The same dataset also has a wear test where the Michelin CrossClimate 2 had an estimated tread life life (based on calculating the most-worn groove of a rotated set) of 77,590 miles versus Bridgestone WeatherPeak at 41,127 miles.

Dry

Dry Braking

Wet

Wet Braking - Worn

Snow

Snow Traction

Results

1st: Michelin CrossClimate 2
235/55 R18 3PMSF: yes	Test # Result Best Difference % Dry Braking 1st 34.44 M 100% Wet Braking - Worn 1st 43.56 M 100% Snow Traction 1st 93 N 100% Read Reviews    Buy from £139.90
2nd: Continental CrossContact LX25
235/55 R18 3PMSF: no	Test # Result Best Difference % Dry Braking 2nd 36.91 M 34.44 M +2.47 M 93.31% Wet Braking - Worn 2nd 59.68 M 43.56 M +16.12 M 72.99% Snow Traction 3rd 63 N 93 N -30 N 67.74% Read Reviews
3rd: Goodyear Assurance WeatherReady
235/55 R18 3PMSF: yes	Test # Result Best Difference % Dry Braking 3rd 39.56 M 34.44 M +5.12 M 87.06% Wet Braking - Worn 3rd 60.53 M 43.56 M +16.97 M 71.96% Snow Traction 2nd 65 N 93 N -28 N 69.89% Read Reviews