I returned GRAW. I thought it was way to tactical for my taste. the enemy AI in the game is absolutely insane. As for multiplayer, if you're not good at tactical games, you will hate multiplayer. You're goin to die every 5 seconds and your teammates will hate you.
Fight night, is by far, graphically, one of the best 360 games i've seen. However, I do not know much about the online play, only thing I know is, the friends of mine that do have it, say its definetly one of their fav games.
imho, fight night.