Board Thread:Theories and Speculation/@comment-28939725-20161201164545/@comment-734582-20161205094105

QuakingStar wrote: Obito is not better than Nagato with Rinnegan. I think you missed my point. Obito is better than nagato when he received that eye. In a few days, weeks at most, Obito was controlling 6 biju. His Six Paths technique was more advanced. He did a bunch of things. Nagato's first documented use of a Path is summoning Gedo when he was already in Akatsuki. The rest of the paths he developed afterwards (since the Six Paths technique is a response to his immobility).

Comparatively, Obito learned it a whole lot faster. He was also busy growing an army, developing the Ninjutsu to create his six paths (e.g double sealing Biju, creating the controlling chains, etc), etc. He simply may not have had time to learn to use all techniques. After all, he saw what awakening Susanoo did to Sasuke and may not have wanted to spend a day or more half-dead from the aftereffects, when his time was limited and precious. (Keep in mind, Kabuto didn't join until a day or two before the war. Until then, Obito was expecting to fight the entire thing himself, with 6 biju, his Paths and 100 000 zetsu)