I expect that besides the 4.0l engine and 500 hp, the GT3 RS LE will have less weight thanks to the carbon fiber parts used on the GT2RS. In addition, I expect the modifications to the GT2RS suspsension (solid bushings, etc...) will cary over as well. I have also heard Porsche will improve the areo/downforce package. If I was in the market for a new Porsche, this would be it.