Gran Turismo 5 or Grid and why? for ps3?

I like both games for different reasons, grid has awsome graphics and damage physics that is state of the art replay feature is pretty neat, you also have different modes like demolition derby, Indy, Drifting, and muscle car racing, and GT5 you get alot of cars to buy and choose from, upgrading your car is fun, and the online is awsome, but if i had to pick a game i would get GRID one thing i dont like about GT5 is you cant damage your car at all and its not realistic

Gt 5