noticeable differences in performance, this is strictly street duty only and I have StopTech BBK on all four wheels mind you. The ceramics are MUCH quieter and virtually zero dust. I would not use them as a track pad at all though.
The worst I have put the HPS or the Ceramics through is at ZdayZ which heats up the pads pretty good but no where near of what I would consider the limitations of either pad.