First winter tire test (of 225/45 R18 performance winters) I have seen this season comes from the German magazine Auto Motor und Sport. I don't think ice traction was tested, only snow, wet, and dry. Shina Guide (Russian) has a good summary here:
https://shina.guide/press/11922/#more-11922
Of the ten tires tested, the Continental WinterContact TS850P was scored #1
The Copper Weather Master SA2+ was scored at 10th place.
The Dunlop Winter Sport 5 was scored at 2nd place
The Michelin Pilot Alpin 4 was scored at 4th place
https://translate.google.com/translate?s...&edit-text=
Quote:
...All test events were held in Ivalo (Finland) in the spring of 2017 at an air temperature of -2 ° C to -10 ° C. As a test car used the BMW 430i Grand Coupe with an engine power of 252 hp...
...Unlike other participants of AMS tests, which performed well only in certain test disciplines, the Continental TS850P did not compromise anywhere, and therefore the high overall result of the model in the test made it an excellent option for use in the countries of Central Europe, characterized by a mild winter with a predominance wet and dry roads….
https://shina.guide/press/11922/#more-11922
Of the ten tires tested, the Continental WinterContact TS850P was scored #1
The Copper Weather Master SA2+ was scored at 10th place.
The Dunlop Winter Sport 5 was scored at 2nd place
The Michelin Pilot Alpin 4 was scored at 4th place
https://translate.google.com/translate?s...&edit-text=
Quote:
...All test events were held in Ivalo (Finland) in the spring of 2017 at an air temperature of -2 ° C to -10 ° C. As a test car used the BMW 430i Grand Coupe with an engine power of 252 hp...
...Unlike other participants of AMS tests, which performed well only in certain test disciplines, the Continental TS850P did not compromise anywhere, and therefore the high overall result of the model in the test made it an excellent option for use in the countries of Central Europe, characterized by a mild winter with a predominance wet and dry roads….