Can you confirm that I can flash the rom on my EUX coded Fold3?MSR and XSP are the same since they both belong in the same multi-CSC family. XID is different, don't get confused. PDA might be the same but contents may differ a little bit. To avoid getting bugs or errors, if you are going to flash firmware from a different multi-CSC, do not use HOME_CSC (this will result in a factory reset).
Yes, as long as your current firmware and the new firmware you downloaded belongs to the same multi-CSC, you can use HOME_CSC.