Honestly kabuto wins mid diff
Alot of u will just say minato just because but clearly he loses...
Sage art:inorganic animation
Sage art: white rage
Earth shore return
Hiding like a mole
Water dragon bullet
Great White Snake transformation
With sm reflexes/sensing ftg is useless and if ftg is useless minato is useless, ftg can only be used as a minor distraction, minato would have to use his toad summons or try to go into sm himself which is highly unlikely in a 1 vs 1 battle and his toads would easily be beaten by the colossal Manda 2 that is multiple times larger, stronger and faster than the original Manda that rivals the most powerful toad and slug summons not to mention kabuto has other snake summons that are giant in size and that can liquefy and absorb chakra
Minato'sonly way to achieve victory is Rds and kabuto isn't going to give him that opportunity to do so...