We have never seen Kaiten be used on attacks such as Chidori, Rasengan or even a Katon jutsu. We have no idea how effective it would be against, let's say, Sasuke's chidori sword.
Also, we don't know how Byakugan sees through objects or what effect so called "x-ray" vision would have on sight-based genjutsu.
But it would be a very interesting match up, one that I would very much want to see at some point in the Manga.
I am starting to dislike this all Sharingan theme, so overused and dragged out.
Why can't we have a Neji and Sasuke fight or something? It is more than obvious that Kakashi "chose" this current team because these are the characters that have not been in the new arc yet.