Board Thread:Naruto Discussions/@comment-34436445-20180627113230/@comment-26107879-20180721093720

@Jason

Ah. Okay. Then I misunderstood you. I should also remind you that even though Itachi was still knew that he was under Koto, he still was under it's effects. So even if one knows, it doesn't necessarily mean they break free. It wouldn't be the most powerful Genjutsu if that were the case.

@Arturia

Except for the fact Koto beats Kamui in terms of speed. If both a Kamui user and Koto user were to meet in combat with no knowledge of their abilities, both activate their Mangekyo at the same time, Koto would hit first. The reason is Koto is pretty much instant where as Kamui is not (the whole reason that both eyes double the speed is used simultaneously). However, a Kamui user can still beat a Koto user if they're just overall better and outsmart the user beforehand. So, the abilities Koto beats Kamui, but that doesn't mean a user of Koto will always beat a user of Kamui.