Should i give up my XBOX OR PS3?

My brother is leaving and is asking me what he should leave behind for us? His XBox or PS3? So which is better and worth keeping? LIke based on the games and stuff. Because i really love my PS3 because i have Dragon Age origins on it but I love that the Xbox is multiplayer and stuff. i'm really stoked and cant decide. The thing is, I'm waiting for awakening and if my brother brings the PS3, I'm going to have to start again and stuff, buy DA:O for xbox and blah blah blah. but the XBOX is cool and I'm not making sense. OK long story short: XBOX OR PS3?