The PS13 brakes feel a lot better than the Z32s. I think the single bigger piston on the PS13 brakes is a better match for the stock 240sx master cylinder. I didn't get a chance to brake from 120 in Mattback's car, but doing that in my brother's Z32 brake equipped car was like throwing a boat anchor out the window. It was a lot more violent than I was expecting. My brother's setup is OEM style rotors, SS lines, and Metal Master pads.

Here is a comparison that I did between stock brakes, PS13 brakes and Z32 brakes. NOTE: The 300zx rotor in the comparison turned out to be something different. The real Z32 rotors (even the 26mm) were noticibly thicker!

http://www.carbonite.org/~epstein/day11.html