JFT, these are press pictures. If you want to, I can mail you the full size pics. (best to pm me your emailaddres)
And no, I tried to, but I couldn't find any differences either. I think it is mainly in body weight.
1st997: There are no sidepics of the RS yet, so I couldn't find a clear pic of the decal, sorry! Maybe try the sidepics of the 996 GT3 rs, and edit it. But it looks kinda wannabe to put "gt3 rs" on a C2. Might best go for "carrera"
-Joost-