I live in New England and every spring and autumn i always have in the back of my mind, what if it snows while I have my summer tires on! My set of summer tires Bridgestone Potenza RE760 Sport which will be worn out mid summer have a traction rating A . How would a All Season tire with a higher traction rating of AA like Bridgestone Potenza RE970AS Pole Position compare with summer tires with A rating? I know there are a lot of other factors that come in play but I am just looking for a general answer if (A) Summer Tires would be similar to (AA) All-season as far as gripping the roads on corners etc.