The snow pro is obviously some kind of high bred thingy mo bob so who really knows.
If you were comparing a correctly set up stock M7 vs a well setup stocker IQ RAW 600 they are almost identical in straight line drag racing (pol has a better track that hooks up better and offers an advantage here that makes up for the slightly lower HP), almost identical in straight powder climbing (grade that both can handle so calculated in ground speed), Polaris 600 way out handles the M in random boondocking, side hilling either angle up or angle down as it's a much easier chassis to manage off camber, M7 is way better on the twisty trails, but not quite as smooth on the woops. Almost a toss up in actual performance over all except the IQ's far superior off trail all around powder handling makes it a better small cc mtn sled.
Way more important then the brand is who got to set them up before you get it!