I think alot depends on how good GT5 actually is, if it is like Pro-logue then i think it will suck.
Forza however is a series that is doing very well critics wise.
Gran Turismo has fallen by the way side in recent years, as a racing nut i think they have struggled to get to the heights of GT3: A-Spec, that game was amazing. But since then they have not got a game into the 90% score range. The last GT game that got over 90% was in 2001, almost a decade ago.








