Board Thread:Versus Debates/@comment-33229263-20171019104931/@comment-734582-20171020092901

LegionZero wrote: Sasuke casted Genjutsu: Rinnegan on all the tailed beasts. With his special eye, yes. Keep in mind that no distinction is made between the Sharingan and Rinnegan portion of that eye, it's just called a Rinnegan even though the tomoe part is clearly the Sharingan power.

LegionZero wrote: It was also stated that the user can master any jutsu, which sounds like an extension on Sharingan copying any justu, but these mechanics and abilities were ever really explored, so that is conjecture. The Sharingan doesn't really have a power to copy any ability though, it's more of an emergent property. The Rinnegan on the other hand seems to grant power over chakra, to the point it can control spirits (a source of chakra, see: Edo Tensei), easily create new jutsu (e.g. Indra's Arrow) and easily use elemental releases (see: nagato).

LegionZero wrote: This would explain why Naruto never got a Rinnegan and Sasuke/Madara never got 6 Paths Sage abilities Naruto obtained Hagoromo's power as a jinchuriki (IE the 9 tailed beasts combined) while Sasuke obtained Hagoromo's natural power (IE his eyes). Sasuke got chakra from Hashirama and cells from Kabuto, so he obtained the power like Madara (ashura+indra chakra) while Naruto obtained the power of the nine biju, and so recreated the Juubi as Hagoromo had it (IE the spirit). Hagoromo confirmed that his full and real power only is drawn out when all three are present.

Alternatively, one could say that Hagoromo liked the divide of Body/Eyes (since he disliked a single person holding all the power) and so reinforced this in Naruto and Sasuke. Considering he created nine unique entities from a single being, it's well within his power to prevent Naruto from getting the Rinnegan and doing whatever to Sasuke to ensure he only has one (but with Sharingan powers included).

Either way, it seems to me the Rinnegan doesn't need the Sharingan, and Sasuke's eye shows that they indeed are distinct Dojutsu with distinct capabilities. I'd also point to the Byakugan and say that there is overlap in dojutsu abilities, it's just that they tend to achieve this from different powers.