Board Thread:Theories and Speculation/@comment-1512913-20161101211526/@comment-3279282-20161101211915

Sasuke's Rinnegan is to the normal Rinnegan what the MS is to the Sharingan. "Evidence" of this is that both the tomoe and his MS vanish when he's low on chakra, suggesting that they're on the same level.

But that's just my headcanon, anyway.