Eh not really. A GT3 RS has that amazing 9k rpm engine. A Carrera S has a 3.8 NA flat 6. Even with a X-51 power kit, it's nothing like a GT3 engine. And I am not even talking about the 992's which all have 3.0 turbo engines...those are a far cry from the GT3 motor. The Supra, on the other hand, whether it be a base version or a GRMN, will have the same B58. Only difference would be the GRMN will have more power thanks to a different tune. Which I am sure you can get with an aftermarket tune on the base Supra which will match and most likely exceed the GRMN version. Same with suspension parts, brakes, wheels, tires.