i'll make it 3 biased replies in a row!
if you want a purist driving experience like the car magazine writers get off on like rowing the gears yourself as the wind breezes through your hair knuckles white as anticipate the apex blah blah blah get the GT3
if the bottomline is what matters most and you want guaranteed results and to beat everyone else at everything get the GTR
and for those that think the car is boring go take it to 155mph and have to brake down to about 45 for the turn in a few times and tell me how boring it was.. confidence inspiring..yes boring.. hardly