Guts is surprisingly faster than Sasuke in this key, but Sasuke's sharingan really really carries him in this fight.
Sasuke can't do like any damage, outside of Chidori, but Guts can and will dodge it.
I think Guts should take this to be honest. Sharingan's predictive abilities can be circumvented by attacks that have no attack patterns. Berserker Guts is literally all that lmao. Sasuke will struggle to actually read his movements, and since Sasuke is slower, he's going to be on the backfoot the whole match. His kunais, shurikens, fireballs aren't doing shit here. Explosive kunais aren't going to stop Guts from rampaging either.
I think Guts takes this low diff lol