The GTR on Bridgestones is still very fast on corners.

Which tire do you think is better?Bridgestones or N-spec Pilot Sport Cup?

what will a GTR be if it use the GT2/3's N-specPilot Sport Cup?

And do you think that the Dunlops are stickier than Nspec Cup tires? 

 

I don't know how the Dunlops compare to the Cup tires.  It would be interesting to see how a GT3 performs on those Dunlops, while we are asking about hypotheticals.  But I believe they are developed specially for the GTR.

I do know that Nissan says the Dunlops are good for at least 5 seconds around the ring versus the Bridgestones, and that is not trivial.

Also, the GTR records an incredible 1.35G in SportAuto's Supertest released today for the lateral handling segment.  That is with the Dunlop tires and really a fantastic number for a car of its mass.  This test is mostly a measure of grip, not the AWD system.  The only reference cars listed that have more lateral grip are all lighter (GT3, M3 CSL, F430 Scud).   Again, it would be interesting to see what a GTR with the Bridgestone tires records in that test.