I'd have to disagree with aha. Living in CO ive had my MTZ in all kinds of snow and they've never given me any issues. On the street they're excellent in the snow even with my lockright in the back. Snow wheeling I've ran them up against duratracs and came out better in some situations. Paging [MENTION=63060]rickashay[/MENTION] for a 2nd snow review of MTZs.....
Now I've never ran duratracs on my truck, I've only ridden in a truck with them so take my opinion of them as an observer.
MTZs
Pros:
-quiet, more quiet than any other mud terrain I've ridden in
-no adverse effects in snow or rain
-great sidewall, excellent stability on road and they mold really well offroad (20 psi yields an excellent tire mold)
-I've only got 10k on mine but they're holding up very well. I imagine I could get 40k easy
-superb traction on rocks, dirt, mud and everything else you'll run into
-badass looks
-makes your friends jealous (cough [MENTION=78892]FR4R[/MENTION])
Cons:
-somewhat heavy, not Toyo MT status but heavier than duratracs I'd imagine
-chunking, no more than KM2s and duratracs though (based on extensive scientific research with my eyes)
The big thing here is you are comparing a full mud tire to a more hybrid all terrain. Duratracs have more siping and blocks so they should handle snow better, I don't know for sure as I've never ran them. Also mud tires are generally softer so they wont last as long.