Board Thread:Versus Debates/@comment-35155071-20180330190048/@comment-34752936-20180407104808

Obito vs Itachi would be a very close one but I think Itachi could win this. The only things that Obito has going on for him are Kamui and the Hashirama part of his body which makes him pretty hard to kill even if you stab his heart. However Obito's Kamui is arguably slow (since he only has one eye) and he can only keep his body ephemeral for 5 minutes at a time (like Konan noted). This means that an adversary who is intelligent and has a lot of powerful brute force jutsus that will force him to transport himself continuously to Kamui in order to not get hit, has a very good chance of beating Obito. Itachi fulfils all of the above points so, he could beat Obito insofar as his illness is not so debilitating that it hampers the fight.

Also, I don't think Kakashi beat Obito back in Kamui. Kakashi went all out and aimed for the heart but look at the wound Obito inflicted on his body. (Chapter 636)

It's on the bottom right quarter of his body. Nowhere near his heart. Obito did not go for the kill there. So technically he wasn't beat.