Board Thread:Theories and Speculation/@comment-26958911-20160827210047/@comment-9782468-20160912143213

@Skywarrior, no, Kakashi's rasengan did not become Chidori when he tried to add lightning to it. He developed Chidori because he failed at adding Lightning to Rasengan. Chidori is not a result of his attempts to combine the techniques. Chidori is a technique he developed separately to make up for the fact that he couldn't combine Lightning and Rasengan.

Indra had way better chakra control than Asura. He was the prodigy of the two.

Asura did that in a filler first of all. Second of all, techniques that look similar are not necessarily similar in creation and conception. Third, there still is no way for Minato to take the technique and further develop it because they lived so many generations apart. Besides, Minato developed the technique when he was inspired by Tailed Beast Balls.