You guys are all talking about different tires, Greg's test is for the Nero against the Michelin Pilot Sport, not the PS2. The Nero is underneath the P-Zero in performance. The Pilot Sport was superceded by the PS2.
Out of the OP, the PS2 will be the best tire, I have Neros on the 325 DD, they're okay, but no PS2.
The PS2 usually goes against the P-Zero, not the Nero. Cups are talked about in relation to the P-Zero Corsa.