[tmerc]

Op is in a salt state (road salt, snowy winters). Dedicated snow tires are much better than all seasons to the degree I will take a 2wd Civic (with lsd) on snow tires over 4wd 4Runner on all seasons.

Also rotating tires every 10-20k miles is good because most cars run higher camber in the rear (inner shoulder wear) than front and the fronts wear the outside shoulder more because of turning. Swapping them extends tire life by spreading the wear.

[bryanlarsen]

The OP was asking about all weather tires which are rated for winter use in places like Quebec which require winter tires.

Not about all seasons, which are not rated for winter use.