none. they both have gears, and they both have high pressure additives. main thing is to check the manual for the specific application. even some cases the manual calls for motor oil in a MTF. the question should be:
what kind of oil do I use in -fill in blanks- ?
for instance one person on internet was using mobil 1 extended in the gertrag manual transmission, and it worked well, but people here were warning against it. some places mix 50:50 gear oil, motor oil for MTF and that also can work in the right setting.