Ok my opinion:
1.GFX-(agrees with f9)
2.Audio
3.Save State Support
4.Wifi (adhoc for those golden yrs of Golden Eye to play with others)
5.Cheat Code - Implementation
6.C-Button Config (had an dumb Idea maybe the L button can be used along with the up,down,right,left buttons and the analog could be used to move or vise versa, either way i can use both.)
I wish there was a rumble on the PSP lol, that be kool-not really a list but just a thought.
7.Ok i have both versions, with a 4 gig datel i have plenty of space, but i really dont like having to locations for both just really bout organizations,maybe Strnm can implent the N64 folder in the root, or they can collaborate and both can be used, at the same time like the surreal64 which used various emulators with one rom folder on the xbox.
8.possibly keep away to capture Screens from both emulators its kinda cool to share with the community with screens of wat ur playing.
will post more if I think of anything

if anyone needs me or has questions email me at [email protected] im not a coder, proggrammer etc but I do read a lot bout the PSP Scene and if u got a newb question just ask