I lived for 25 years in the upper Midwest and we get some serious winter action! What makes a good snow/ice tire is the number of edges that contact tera-firma. That's why an AT tire has smaller/more numerous lugs, which translates to more edges on the contact patch. They are not, however, as good in the mud because they tend to have difficulty cleaning the tread. That's why a mud terrain tire has big lugs and large spaces inbetween, so that when you spin the tires, the mud gets thrown from the tread and there's a fresh edge to grab the next time the tread comes around. The way a tire wears is a function of keeping it properly aired/balanced/alligned/rotated, and also of how much rubber is in contact with the ground at a given time. An All terrain tire has smaller spaces between lugs and more numerous lugs per square inch, so theoretically an AT tire should take longer to wear out than a comparable MT tire. It will also be quieter as the air stream around the tire at highway speeds is smoother. If you're really looking for snow/ice traction, consider siping your tires (many many small horizontal cuts throught the tread blocks that increase the number of edges on contact with the ground; or consider a Blizzak type tire which also has many many many small edges for maximum traction. Personally, though, I think it's all essoterric if you're not familiar with driving on snow/ice. A transplanted Texan driving a jeep with chains will have a higher chance of sliding off the road than my grandpa, who drives a 2 wheel drive F100 truck with bald tires. Personally, I think the difference is minimal. Unless you're super hard core, my vote goes for the one you think looks the coolest and will give you the most satisfaction every time you have to walk up to it and compare it to other nearby rigs.