Hmm. Assuming no edo... If Kabuto's in the cave he has an advantage. Also, I wonder the effect of his dragon tech? Would Bee's shades be enough to stop that, and what about its vibrations? He can stop liquification with his lightning element, but Kabuto can heal as well. I think their speed is matched v1-sm... I think Manda2 might be able to take Hachibi, outside of the biju bomb, though Kabuto could liquify if he was hit with it as Bee wouldn't be able to stop him then. I'd give this to Kabuto high dif... and a bonus would be his intelligence advantage.