A good game that grows on you as you play. Very Customizable.
That's not to say the game isn't similar. You run around with 4 team members, with a very similar camera view, and wreck damage on your enemies with a combination of button taps for attacking, and your special powers.
The game differs with the unique customization you can do with who you pick to be your team, (and the bonuses for picking pre-defined team members), and the items and stats you pick to increase your heroes' skills. I had fun running around with the New Avengers, and then changing to the X-men later on in the game.
As an avid comic book fan, I also am enjoying the story-line so far, as it's a big broader than the X-men games. Also the fighting seems a bit more flashy; each hero has a finishing move that you can do that's fun to watch, (and tied to achivements).
Graphically, the game is way better than the X-men games, as you can expect from a next-gen game. Some of the characters are a bit choppy up-close, but otherwise I had no problem with the way the game looks.
Sound's okay. I haven't heard anything outstanding, but the voice-acting isn't terrible.
Over-all, I'd have to say this game has grown on me the more I play it. I definitely recommend it to anyone who likes comics, and even to people who don't. It's not a terribly deep rpg, but it's good for those you just like running around with heroes.
Definitely a good game to rent. I would only buy it if you're hard-core about comics.