When asked why the GT2 was quicker:

"Ah yes, it's actually easier to drive. The GT has a long wheelbase and the mid-engine. It is stable but it takes longer to gather up in a slide. So the GT2 maybe breaks away faster, but is also saved faster, and I'm on the gas sooner." He also mentioned his quickest time was with PASM set to 'Normal' and TC and SC were off.

After his first test of the GT2 WR said 'This is the best car I've ever driven'.

I'm going to have to get one of these one day...