A/S tires have more grip on dry pavement than winter tires. Why'd you think otherwise is interesting. Heavily siped tread blocks "squirm" like crazy making predictable handling much harder.
I'm speaking from experience and also from asking this direct question of Tire Rack this week, as I shop for a similar set.
| '13 328i M Sport - Estoril Blue | '12 300C SRT8 | '12 Wrangler Rubi Unlimited - COD MW3 Edition|