There isn't a huge benefit to emuNAND anymore other than maybe a quicker restore/faster turnaround time for messing with things. Also out of region emuNAND and GW use.
The easiest way is to make a NAND backup of your emuNAND. Then use D9 sysNAND restore option (Keep A9LH) and just flash emuNAND backup. Everything stays as it was.