Busbar and other connectors 'appear' to be identical, just the mounting method that is obviously different
Ya poor choice of words on my side, one of them is a lot harder to take off than the other one.
Where is the problem
in the PIC of the PSU, which will have to be reprogrammed;), without reprogramming the PIC, you cannot mount an APW9 instead of an APW9 + (or vice versa)
a spot on as always theirry, do you think it's possible to extract the hex from the PSU's PIC and then write it on the other PSU by using a Pickit of some kind?