Board Thread:Theories and Speculation/@comment-36157725-20180719152108/@comment-4080775-20180719155136

We have no proof of either cases, so we don't know if Sasuke's one Rinnegan is equal to two Rinnegan or not, but I'm side with Madara based on what he said concerning the Sharingan being at full power when you have both. But then again, he only said it about the Sharingan, so who really knows.