IDK. Seems like its a bit of a crapshoot, but the ratings and reviews help. At least they helped me.
I was pretty happy with the Bridgestone Duellers, but when they wore out the reviews at Tire Rack were enoguh to get me to try Firestone's Destination A/T.
Again prety happy with them but not a deep snow tire. I think the newest version (destination 2 ?) is supposed to be better in snow. Certainly decent on highway and dry dirt/gravel etc.