Board Thread:Naruto Discussions/@comment-4704473-20140625072535/@comment-25028454-20140626075217

Same difference and are you trying to tell me that Madara got the Rinnegan while Kaguya got the Sharingan even though it's the same identical eye, that doesn't make any sense at all even if Hagoromo said it himself. It's very possible Hagoromo could have made a mistake and he doesn't know everything about his mother (even though he's her son like you said) Black Zetsu confirmed that last chapter. Until either Black Zetsu or Kaguya say what that eye is on her forehead you can call it the Sharingan and I'll call it the Rinnegan for now at least.