This thread is so funny, just keeps delivering when you least expect.
Maybe i'm just crazy, but out of 100 minutes i would spend complaining about those two franchises, maybe only 2 or 3 would be about visuals. The next big jump will be with PS4/720, until them we're just discussing old tech.
Of course, GT5 looks better, it's silly to debate this, but we need a new gen. I've seen what it looks to be GT6 (Corvette and NSX trailers), and it really makes me feel like there's no place for those games anymore on ancient hardware.
Next gen... NOW!
Also, nobody replied to the clutch comment, and that's something that bothers more than any tearing or 2d tree. It really is poorly coded, a shame they didn't invested time on it.