bfbc2 vs cod bo

Is there somebody who plays BF BC2 or COD BO?
I need some suggestiones, every experience from other players what makes the decision easier to me.
For me its important being tactically and the maps shouldn't be that small. And I love to sniper and if it depends on sniper rifles, I would go for COD BO because of its L96AW. And I like to customize my caracter.
So now it's up to you. What do you prefer? And why?