OS on R4

I use a M3 and M3i and can use diff OS to run the games. like Sakura and m3/g6 real
I'm trying to help a friend ho uses a R4 Neo.
can you use dif R4-OS on any R4 card?
or do you have to stick with the OS of the type you bought??

the original R4 can use ysmenu, all the clones can only use their own specific firmwares as far as I know.