Board Thread:Theories and Speculation/@comment-3568954-20160822081524/@comment-734582-20160829143959

Actionmanrandell wrote: i disagree. being an uchiha doesn't mean he should have been able to use the Rinnegan better than Nagato. the Rinnegan itself is already hagoromo's power then you add into the fact that Nagato is an uzumaki IE a senju, and has massive chakra reserves. The Uchiha are the descendants of the Sage as much as the Senju are. And with his Hashirama cells, Obito had better papers to control the Rinnegan.

The key factor is simply time. Nagato took a decade before he could summon Gedo whereas Obito was using it, controlling numerous biju and his Six Paths within the first week.