Naruto's Chakra source is Kurama. Kurama said Sasuke's chakra was stronger than his in the Beginning of Part 2... Uchiha are said to have the strongest chakra of any clan. The MS is stated by Tobirama to create special chakra. For all of those reasons, Sasuke has stronger chakra, not to mention, getting Indra's strong chakra and eyes from the Sage. Furthermore, to say you need stronger chakra would be to say Nagato has stronger chakra than Sasuke. And that would be ludicrous. Not that it matters, as I already said, the first scenario is based on the end of Vote 2, where neither Kurama or Naruto had enough chakra to defend anything.
When Naruto does the final clash, Kurama clearly says that he is gathering sage chakra. FURTHERMORE, There is no way Naruto can consistently gather Sage Chakra while moving, as it works on the Same principles as the Spirit Bomb. This is why Kurama is consistently in the gathering pose, when Naruto asks for chakra. He isn't generating his own chakra, he is gathering sage chakra.
Not that I expect you, the head Narutard, to agree