I see this match as a draw.
Taijutsu may be inaffective against Suigetsu but that doesn't make him more skilled then Lee. If you have a match where you can't damage your opponent but you're opponent isn't as skilled as you to do the same to you it's a draw.
I mean if taijutsu doesn't work on Suigetsu what about a match up like Gai vs. Suigetsu? who would win in that situation?