I run BFG R1 265/35 front, 285/30 rear.
I keep the PS2 as "wet" tires.
My original impression was that the BFG R1 has higher limits in every sense but when you aproach that limit they are somewhat less predictable. I feel the PS2 has wider transition zone before give away. The BFG R1 lost tracktion all of a sudden a couple of times when I thought I still have good adhesion. I have never spin the car with the PS2s but I did it 2 times with the BFG R1. They are more sensitive to pressure changes, need more warm up, but they never become soft or greasy with my driving. They did improved my lap times.
I am not too experienced on the track, so take my assessment with a grain of salt.