Bee.
Sasuke only beat bee with the help of 3 others the other time.
But its just IMO.
That Sasuke was also much weaker, had no MS techniques aside from genjutsu, had no intent to kill, and was in an ailing body. That same Sasuke also one shotted Bee when he had intent to kill with a single amaterasu. This Sasuke is on a whole different level.
Bee. Without Juggo, Karin and suigetsu, Sasuke was getting whipped out there. be takes this.
This is MS Sasuke, not the one that fought with no MS techniques. Read the OP. All those three did was save Sasuke from injuries that Susano'o will now protect him from.
Bee wins this one. Remember Bee wasn't being serious either. He used this as an opportunity to escape the village. Sasuke was barely hanging on to life.
I'm pretty sure blowing Sasuke's chest out and going full BM means he was serious. Just because he used the opportunity to escape does not mean he wasn't taking it seriously. He even used him most powerful attack.
Bee take this. With the octopus strategy he can always get rid of amaterasu which is his only threat here if he gets tagged, since he is vastly superior to Sasuke in other compartiments of battle and shits on him in terms of fire power
That will only work if Sasuke decides to cut off a limb. He knows about that so he will not. Yes, he was superior to a novice, ailing, not willing to kill Sasuke. Not very impressive, especially since he was the one who had to run away in the end.