Wrong forum but I'd have both if I had the money.
I own a XB360 and there are plenty of great and exclusive games for it. Also has the backwards compatibility with over 400 original Xbox games so don't forget that. But I hate the current XB360 Windows 8 style dash and the fact it doesn't even place the gaming 'tiles' sections on the start screen. Being in the UK I do like that it has the BBC iPlayer but almost everything else useful requires you to sign up to a Xbox Live Gold account.
PS3 was a problem for me right from the start. Not enough exclusive games I wanted to play to justify the cost back then. It has been for me very much the Nintendo Gamecube of this generation. It has taken until just before it is going to be replaced to get me interested enough to seriously consider the, now very reasonable, cost. Being able to play Uncharted, The Last Of Us, Ratchet and Clank series and some of the PSN stuff like Journey, Flower etc is very tempting.
I suspect that if I buy a new console in the next year (unlikely) it will be a PS3.