Sasuke extreme diff
He broke out of Tsukuyomi, overpowered Itachi’s fireball jutsu, dodged Amaterasu repeatedly, tricked Itachi into helping him active Kirin, and oneshot Itachi’s Susano’o (with Yata mirror) with Kirin
If he manages to get Kirin ready, he wins, guaranteed
Without that, I still think he wins extreme diff