I think the next gen are quite a bit more comfy for really short trips(and would be nicer for racing) but I did find that after 2+ hrs they were worse than the classic performance seats. I seemed to have some (very minor) hip / lower back pain that went away pretty quick.
not sure about the electrics for the swap either? I think
@wk057 did a seat swap a while back on the classic 'yellow' P90 with the AP1 retrofit