^ Sasuke got a huge upgrade because his Rinnegan came packaged with half of Hagoromo's chakra. Madara gets no such perk. The only boost he gets is from the Rikudo Chakra he got when he stole Hashirama's DNA, and the chakra he'd get from being the original wielder of the Rinnegan.
OT: DA termed Madara's Rikudo charka perfectly. "K-Mart quality" Lmao. Makes sense for the quality of his chakra to be far weaker than Sasuke's considering Sasuke got his straight from the source. Madara's is composed of his Indra chakra and a piece of Hashirama's Ashura chakra. So yes, there should be a boost since the difference between EMS Madara and Rinnegan Madara's chakra should be noticable, but is it anything compared to what having half of Hagoromo's power does for Naruto? I'm gonna go ahead and say no.
-Chidori=Rasengan.
-Chidori wrecked a Meteor the size of Hokage Mountain. That puts it at Mountain Level at the very lowest. Probably low-mid since he vaporized it.
-Rasengan should do the same.
-Oodama Rasengan>Rasengan.
-Chou Oodama Rasengan>>>Rasengan.
-FRS>>>>Rasengan.
FRS would be over 10x the power of that Chidori, and that Chidori was already wrecking Meteors. Imagine those same attacks enhanced by Sage Mode. Gudo Dama tanked Naruto's BSM BD and Sasuke's Senjutsu Susanoo Arrow with only a hole going across it. In The Last Naruto hit the Gudo Dama with only a few Chou Oodama Rasengan in his Rasengan barrage, yet he completely obliterated the Gudo Dama. So unless Toneri's GD are far weaker than Obito's, The Last BSM Naruto's Chou Oodama Rasengan Barrage>>>Naruto's BSM War Bijuu Dama, considering only a few attacks in that barrage actually landed the mark.
So that means that Naruto would be capable of doing some damage to Madara's regular PS w/ attacks like FRS and Chou FRS let alone Bijuu Dama. Not sure how much stronger Madara's PS would be, but is it so much stronger that we'd be able to say that he'll take Naruto's regular Continuous BD with minor damage let alone his Flash BD? Doubt it.
The Last Naruto wins with ease.