I've had 3 sets of BFG MTs, older model and newer, and they have worked out great for me. I cant imagine ATs being better in deep snow than MTs?

And as for mileage, you'll get the same. Plus durning off season, the MTs would do better on non-snowed trails. I've gotten about 60k out of each MT I've owned

99JAOS2"& OME 2"body 4.90s ARB HS9500i Skids&Ladder 16"315BFG JAOSRemote& Rack 3Row Rad IPF back& Searchlite HID Overhead Console/CB switchPanel FrARB RrLocker TJMSnorkel 160AAlt Sliders 2nd Tranny Cooler QuickAirII& Tank Rear frame/tank Lift