Why would they bother to have a standalone Neo-Geo emulator unless they are using a build of MAME so old its Neo-Geo emulation is totally useless... Although, they could be doing what many neoragex kiddies did back in the day and running a standalone emu because their hardware sucks so much they need a Neo-Geo emulator that has all the "make stuff run faster" type hacks.
Surprised that any xxx-in-one board would have hardware new/powerful enough to even RUN Neo-Geo