According to this webpage it looks like these drives are identical … ? Is it possible for me to flash my SOHC-5232K (my current FW is NK0J) with the newest R$0G firmware? Does anyone have experience with that?
You could try to do this with a flashfixed firmware flasher.
As this is a Mediatek drive, you won’t lose anything if it goes wrong, you can always resurrect it with MTKFLASH or XSF