I'm also thinking of snow checking a 2013. My thoughts are handling wise in technical situations is that the pro is the best at the techincal stuff, and the M is second place - their overall architecture is similar w/ the Pro taking the good and vastly improving it. The biggest difference i feel is the fatigue from riding an M compared to Pro as well as the commanding riding position the pro has over the M. You ride further forward on Pro for sure, where the M feels positively enormous out in front of you. The suspension action is also vastly improved on the Pro, even if the shock package is not that much better (or worse). The M's steeply raked running boards always wore my legs out faster too. I also think the Pro is a lot smaller feeling than the M, which again helps with its agility. Basically the Pro is what the M should have become (instead of becoming a crossbread of an M and an XP - belt issues included!). The steering geometry is right, the small feeling is right, and clutches are good, the skid the is money, and its light! I just wish it had a little more poop. Not tough to add that!