differences..
dustcover is extended
has rail
frame is different..has the frame of the 75 SA..more upswept beavertail
trigger is different..has the trigger of the P01
Slide stop is extended like the P01
Magwell has more bevel
texture on front strap and backstrap
barrel had bull barrel configuration, is thicker
flgr ( plastic)
slide is heavier, doesn't have cutout as the 75b
front cocking serrations on slide
mags have more capacity
that's all I can think of right now..