KresoF1:

"What car is easier to drive on the limit? GTS. What car is more confidence inspiring for fast track driving? GTS.

GT3 is more handfull and if you really know how to drive more rewarding.  New GT3 is actually more demanding then 991.1 version."

New GT3 has some "nervousness" built in. Some will claim it makes the car more "alive" and offers way more "feel". 

All this is really interesting since Corsa N0 (GTS) is not as extreme as Cup N1 (GT3) ans that (as well as track temperature etc) should be put into the equation as well.

CG also explains the conditions under which the GT3 is more "nervous":

(i) breaking into corners

(ii) throttle changes in the corner 

(iii) too much steering input in corners

It is interesting that he even mentions (i) and (ii). Who drives a 911 on track using this kind of driving style Smiley For decades, these two tricks have been in used the 911 to let the rear snap in a corner...