I've never owned the Revos, but this winter I've had plenty of chances to try out my BFG AT's in snow and a good bit of freezing rain. The verdict: the tires performed far better than I expected for an AT tire. They really stuck well and provided outstanding traction - of course that was in 4wd.

I strongly recommend the BFG's, in my opinion they are the best AT tire on the market (but I've never owned the Revos).