these are the same
battery's , cooling fans late krc1 had the same motherboard ram and processor as early krc2 (soyo)
the hard drives are the same
RDW card there are 1 and 2s these are interchangeable
Video card is interchangeable on some models
not the same
KCP not the same at all
RDW (resolver cable) not the same as krc2 has a larger pin on the controller end of the cable
Motor cables have different pin configuration ( you can get the right leads to run an old kr125/1 on a krc 2 for example)
MFC is not the same
hope this helps a little
