When it comes to feats, it's true Madara lacks a lot due to the plot reasons, however, feats in the end do not decide to the winner when logical reasoning and information about the character's power is stated. Let's see the difference between Sasuke and Madara:
- Madara's PS is enhanced by Yin Chakra & Yang Chakra & Juubi's Chakra, in comparison to Sasuke's PS enhanced by Yin Chakra & 9 Bijuu's Chakra. In this area, Madara dominates significantly.
- Madara's Rinnegan is manifested by the fusion of Indra's and Ashura's Chakra, whereas Sasuke's is only Yin, making it incomplete. Other than the vast knowledge and access to its full power by Madara, he wins in this area.
- Madara possess an advanced Rikudou Senjutsu than Naruto, who overpowered Sasuke's prime. With it, he has twice the boost of Sasuke's abilities and much greater boost with Juubi's Chakra.
Just like how feats are not required for the manga to decide that Hagoromo or Hamura low diff Naruto and Sasuke, the same applies to Madara. Madara toys around with Sasuke and kills him after he gets bored. That's how the match will go.