VFPS is the actual performance of the emulator, FPS is the framerate of the game (simplified version). If VFPS says 100%, the game is running at full speed.
Like PC games, not all console games run at a single FPS; some are variable framerate and may vary in game, or they may use odd framerates (e.g. many N64 games ran at 20 FPS or similar "weird" numbers).
If you want to boost the framerate of a variable framerate game, you can use the "override CPU clock" feature, but bear in mind this can cause instability/bugs in some games that don't take kindly to being given an unfairly fast Wii to run on.
Like PC games, not all console games run at a single FPS; some are variable framerate and may vary in game, or they may use odd framerates (e.g. many N64 games ran at 20 FPS or similar "weird" numbers).
If you want to boost the framerate of a variable framerate game, you can use the "override CPU clock" feature, but bear in mind this can cause instability/bugs in some games that don't take kindly to being given an unfairly fast Wii to run on.