Which version of Sonic from Genesis is better to run? I have WiiVC and GenesisEMU. Who recomend me the best version to run Sonic?

It depends which emulator because only 2 are allowed on the leaderboard (See Rules tab). Emulator is good for practicing and learning with savestates at first though.

Emulators are rather versatile due to its savestating features, beneficial for practicing by allowing you to instantly retry a trick if you missed it. Be warned that some ranking sites don't look too highly on unofficial emulation, and if you are bothered by that, then WiiVC is the way to go.