i'm sorry but neither of them two have a gti-r so, i have to say tokyo x 3 in which i can fully paint the car the way i want to, inch by inch, and you cant do that in any other game. but by game play gt4 realistic too much some people dont understand tuning, forza realistic yea but as my buddy show ttt, it has markers that adjust to ur speed and angle telling u when u need to brake or speed up, didn't like that my self it made the game way too easy. and kirk pm me i need some service on my xbox pls.