Today I just got some interesting numbers regarding the Hockenheim (Kleiner Kurs) track results (done by the same professional driver):

997 Carrera S (PASM): 1:14.7 min
997 Turbo (manual, sport chrono): 1:12.5 min
997 GT3 (Michelin Cup tires): 1:11.4 min

Same driver, back to back driving on the same day, air temperature was around 30*C.
On the 997 Carrera S and 997 Turbo, PSM was turned off, Sport Chrono was turned on.
On the 997 GT3, TC was turned off.

I can't provide more details.