I have not tried out the new nester yet but I will I have been to busy playing with little john latley. The new version of little john is amazing speed and sound 100% the coompatability is not perfect but it is deffinatly close. There are a couple of games that I have tried on other emulators that have had trouble but little john handles them well so compatability is very very good. It has options that will blow your mind. Save states, gamma correction, zapper support (duck hunt), screen scaling and a ton more. I can't imagine that fnes or nester could be any better but I will give them all a try at some point. I can't speak for the other nes emulators but for now this is deffinatly my favorite emulator on the gp32.