Board Thread:Theories and Speculation/@comment-1512913-20161101211526/@comment-4271790-20161101212646

My headcanon: I was always of the mindset that Sasuke's unique Rinnegan was a two-in-one Rinnegan. Or in other words, one purple 6-tomoe Rinnegan is just as powerful as two purple tomoe-less Rinnegan. I use what happened to Sasuke's eyes in Naruto Gaiden as evidence as well. But that's just me.

EDIT: So if I had to put the Sharingan, Rinnegan and Rinne Sharingan in stages in terms of power from least to greatest, it would be 1-tomoe Sharingan → 2-tomoe Sharingan → 3-tomoe Sharingan → MS/EMS → Red tomoe-less Rinnegan → Purple tomoe-less Rinnegan → Purple 6-tomoe Rinnegan → Rinne Sharingan. Again, that's just me.