venturaII: just that .. in winter it matters more how much grip you have in "worst scenario", like doing emergency braking on icy and/or unplown road or trying to avoid obstacle in front .. yes, dry grip will be less, but where it's way less important, as on dry tarmarc simply can be compensated with driver inputs/sanity by being easier on go pedal. One thing is how fast extra grip can help when pushing >9/10 on dry track, another - those few meters that divide if you have totaled your car from if you managed to brake in time/avoided crash at all on daily driven roads full of drivers of .. "varying skill"
and roads themselves in state .. "far from ideal". Even powerful turbo evo-s ride on ice on very narrow tires. That should say something ..