Which game should i get? forza motorsport 3 or need for speed shift?

i played both demos and they are basically the same with only a few differences. i know forza has more cars and tracks and i like that but need for speed has really great game play. i cant decide, any suggestions? and please add why you think what you do.Which game should i get? forza motorsport 3 or need for speed shift?
Definitely Forza especially if you have high def television graphics and features will blow your mind..............................In a good way of courseWhich game should i get? forza motorsport 3 or need for speed shift?
Forza 3



it is the best driving game i ever playedWhich game should i get? forza motorsport 3 or need for speed shift?
Forza is for the more realistic players, so if you're into more realism in your games then go ahead and get that.