Hell... you can even buy an XMLE for substantially less than the MMR. I have one for sale right now
I do love the humour in MM and the game flow is great. It will feel good to the novice player and also has enough depth for a more seasoned person. Not getting it until next year though...
XM is fun and has tons of toys (XMLE has a few more of course) and the modes are just great. I love that the game has so many great combos and now, with Deadpool, those combos have a real purpose.
The downside is that the shots are very tight and the magnets/spinning disc really add a lot of variables. It can be frustrating at first for the novice... at least until you get really used to the tight shots and rules.
I love that you can approach two different wizard modes by either playing villains or heros... or both.
In terms of depth, I think XM is up there with the best of them. A very underrated pin IMO