I try to keep it simple...

there is only one G+ friend available... he has used both Porsche codes and allready did some races with the Porsche.

So he also has the 911RSR 2013, but this (in my opinion) can't be the reason that there is his icon.... or does this icon mean this...he had a car of this series and has reached this position of possible reached racing events, even if he had a lot work to do in other series??