Developer skogaby just updated his SNES9X port, CATSFC-libretro-vita to 1.1.0. This version is based on SNES9x 1.43 (opposed to SNES9xVita being based on 1.52). CATSFC-libretro-vita has better speed (full speed on a lot of games) but it has less accurate emulation compared to SNES9xVita. With the version 1.1.0, it now has the multiple display/controller options and modern GUI of SNES9XVita.
Full speed Donkey Kong Country on CATSFC-Libretro-Vita
Developer skogaby ported both SNES9x 1.43 and 1.52 to Vita, one being CATSFC-libretro-vita and the other being SNES9xVita. Even though SNES9xVita has better emulation accuracy, unfortunately it doesn’t reach full speed on Vita without frame-skipping in most scenarios. That is especially true if you are using Unity 1.05 which doesn’t have the 444 mhz CPU support. SNES9xVita has a great GUI, savestate support, configurable screen size and more options which CATSFC-libretro-vita lacked before this release. Due to the high demand of community who wants to enjoy CATSFC-libretro-vita with the great GUI of SNES9xVita, skogaby updated CATSFC-libretro-vita, making both of his SNES9x ports have the configurable options and the modern GUI.
If you are using Unity 1.06 which needs 3.30-3.51 firmwares, I would advise to use SNES9xVita for better emulation accuracy. If you are using Unity 1.05 like me, as you are stuck to 333 mhz CPU, it would be wiser to use CATSFC-libretro-vita for better speed.
I want to thank skogaby for porting both SNES9x 1.43 and 1.52 to Vita and leaving the choice to the end user.