rxtools is stable. I'm not sure where people are coming up with it being unstable
reinand is pretty much just the home menu with signature patches removed.
rxtools has other apps it can use(fbi injection, devmode, nand dumping, etc).
pasta is just signature patches removed but only works in sysnand. This means installing a bad cia can lead to a brick. Least recommended because of it using sysnand.
all 3 launch through mset