Why not both? Just throw all that hard earned cash right over the edge of a cliff!
jk
Don't get the console for just one game, look at the overall statistics. Where are most of your friends on? Which console has the most games you play or are interested in? Which lay-out do you prefer? Which controller do you prefer? How much money are you willing to spend?
In short, which one fulfills your needs the best?
I chose Xbox according to all points stated above