I don't think any other game will match up to diablo..
Blizzard does it very well. I read a few articles through interest in a diablo approach
but all they do is keep referencing "It's a diablo-like game"
I don't think any game is a diablo like game. maybe the same genre, but never close to blizzard's approach.
I haven't played Marvel Heroes but I assume you can't equip new armors and weapons or even obtain rares.