Speed comparisons between series always tricks me up but I am fairly sure OP is much, much, much faster than Naruto.
If you make them relative then...
Zabuza
Mifune
Darui
Kisame
Zoro beats all of them in his FMI ~ Act 2 of Wano incarnation. His AP is between 6 tails Naruto and Bijuu Mode Killer Bee. That's too much for any of them to deal with.
I give Killer Bee 60/40 against FMI ~ Act 2 of Wano Zoro. His durability isn't as great as some people think, at least to slashing attacks.
He lost several tentacles to Obito's shurikens.
But those same shuriken failed to puncture a stone wall, albeit augmented by ninjutsu.
Bijuu bomb is really Bee's only assured method of victory here. He can endure that much better than cutting attacks whereas Zoro almost died to King's Jackpot. So even if one doesn't kill Zoro, it's going to be doing much more damage to Zoro than it ever will to Bee.
FMI ~ Act 2 of Wano Zoro v. MS Sasuke
Does not have the immediate AP to bust a Level 4 Susano'o, which is capable of tanking mountain buster attacks. Itachi's Susano'o in a lesser level was able to block Kirin which obliterated the top half of a mountain and Madara's Level 4 Susano'o took a point blank Bijuu Bomb courtesy of Hashirama's redirect and Madara was left unscathed.
Zoro's best moves are damaging this level of Susano'o and considering the strain of Susano'o, Sasuke might not be able to recover.
Likewise Enton and Amaterasu can GG Zoro if he's hit. I have full confidence in Zoro fighting through Enton burning him up, but it will burn him up.
Zoro seems like he's stronger with Sasuke really relying on his best to survive—which incites stamina problems that this vers. of Sasuke has—and really only being capable of KOing Zoro with Amaterasu/Enton. But Zoro can repeatedly toss out small mountain sized slashes (See Pica fight) and Amaterasu/Enton can be deflected with large wind slashes changing their pathways. So Zoro has the tools to win but there's the chance for defeat.
I'd have Zoro at 65/35 here.
Rooftop Zoro v. EMS Sasuke
Sasuke has no notably stamina problems and has a Perfect Susano'o which should be capable of unleashing comparable slashes to Dressrosa Zoro feats. So IMO this is a pretty decent fight, Sasuke's a pro at coating himself and his attacks with Enton to add on lethality. Zoro's a monster of AP here too, having released more of Enma to successfully damage Kaido and even scar him.
IMO the biggest threat remains to be Enton. With Asura, Zoro's 100% cracking perfect Susano'o open and he only needs to land 1 serious attack to mortally wound Sasuke. The only question is if he lives past it.
Zoro 60/40 here sounds fair.
KoH Zoro v. Rinnegan Sasuke
Sasuke's too haxed at this point with his teleportation and amped stats. Add in VoTe2 Sasuke and Zoro gets murdered. I don't think there's an OP character who scales to the weakest god tier, Juubito, yet.
