A lot of the braking issues of winter tyres are caused by the generally lateral siping causing the tread blocks to fold over under braking. Some tyres (such as Sottozeros) have more random siping direction and tread blocks that lock together under braking, but lose out slightly in acceleration and braking grip on snow. With the Michelin X-Ice XI3 tyres I have used in the same size as Sottozero 3 tyres, you can feel the tread blocks on the X-Ices give way on wet and dry surfaces under hard braking, leading to a 23% increase in stopping distance compared with the Sottozeros on a wet surface.
https://www.tirerack.com/tires/tests...y.jsp?ttid=193
https://www.tirerack.com/tires/tests...y.jsp?ttid=181