if yoy have played forza then how can you even compare it with gran turismo games?but there is one thing from the first playstation era that still exists to this day:brand names and promises too big to keep.playstation 2 had the emotion engine which promised things that never did.playstatio 3 had the cell that nobody ever understand and it is miles away from what sony said.the crowd was sleeping all these years and followed sony blindly.but not anymore.see the sales of ps3.the same will hapen with gran turismo.do you believe that it will even reach half the sales of gran turismo 4?it will sell well because of the brand name it caries but not in the level of the previous game.the quality of the series is falling down after gran turismo 3.