Holy crap dude NO. RS has an entirely different engine, if you are talking about a 2G. GS has much weaker stuff, like weaker internals, dont know about DSMs but might not have oil squirters like the turbo Supras do. GS is almost a different engine altogether from a 4G63T. As far as differences between GSX and EVO...few, other than looks and 2/4 doors, but being more expencive the EVO would be a better buy, as it is a bit more in depth.