Originally posted by: Maximilian
Gears 2 > Resistance 2
Online or not.
And you think this because....?
To the OP, Resistance 2 is known for having one of the best MP components available. I can't personally say much about it, because I haven't played much.
However, I've heard GoW2 is relatively buggy, and I personally didn't find MP that interesting. A lot of guys on my floor, however, did like it.
As for SP, I really enjoyed R2, though it definitely wasn't amazing (ex: the ending sucked). GoW2 looked like more of the same (which R2 definitely has changes), and I could never get into GoW2.
I don't know if that helps. I personally think R2 is more fun, but you may think otherwise. Why not rent both to try them out and buy the game you pick off ebay?