Marky911 said:C4 shell is the stiffest, not C2, hence the GT3 using a C4 derived body shell with additional stiffening.
I think the C2 appeals to drivers who want a 911 that's most in keeping with the original blueprint. Rear drive, Coupe, no nanny aids or electric gizmos.
C2 Coupe is lighter, has less to go wrong (whether that be roof mechs or front diffs), it turns in the best and gives the most feedback.
Most people would be happy with a different variation but I personally like the purest one, as I've only ever owned rear drive 911s and came to my C2 from a GT3.
As long as you enjoy the car you've bought then that's the car for you. The market will always value a C2 manual Coupe over all else though. Its just the way it is.
Interesting. I find the stats on torsional rigidity quite interesting when and where one comes across them. Do you have the numbers for the various 996 models? From memory the 996.1 was 45% stiffer than a 993 (not sure which model though) and the 996.2 was an extra 20% stiffer or thereabouts which was quite a step forward.