First off it has already been displayed that naruto's fox chakra increases the power of other's jutsu dramatically, so it is arguable whether or not sasuke can maintain that and unlocked that form all by himself but for the sake of it I say he can, either way does it matter? He would had unlocked those sussano feats sooner or later, no point in arguing it now.
Anyways i give this current ems sasuke to be honest, I can't see any attack from naruto that would bypass sasuke's sussano, potentially a odama frs he used while on top of gamabunta's son during the war can maybe bypass sasuke's sussano but thats a stretch to say the list. Regarding kcm's naruto speed, it should be much of a problem considering in the latest chapter it was showed or hinted that
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. Also correct me if im wrong but during the early part of the war before obito became the Juubi jin, when he fought with bee and kakashi and guy It showed obito capable of keeping up with the kcm clones momentarily and etc I believe? Also madara reacted to a bm naruto with a tbb rasegan via his war fan covered in sussano aura.
Honestly I give this to sasuke, his enton spam and amaterasu are too much for kcm naruto to handle, and then theirs e prepping lightning style kirin to finish the job.