It depends on what you mean by "better". Gt5 will be more realistic but not more impressive. You see realistic cars all the time but how often do will you see top notch realistic monsters, gods, and whatever else you see in Gow. For me, Gow 3 will look better even though I haven't played either game. I wouldn't care if GT looked perfect, I wouldn't be blown away... unless GT used massive explosions with people flying through the windshields. Since that's unlikely, Gow will have the wow factor and will look better for me.