My GT2 came with the Michelins, when I changed tyres after around 8000 kms I went for the Pzero Rosso.
What a difference! The Pirelli wouldn't grip when cold but as it got warm its grip levels were way above the Pilot Sport's.

I had the opposite experience with my Modena, in which the Pilot sport offer more grip than the Pzero Asimmetrico.