People who say saying that Sasuke is NOT stronger than Madara... Really? Sasuke is stronger than Madara. It just depends which Madara you are talking about.
Base Madara:
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Edo or not, Sasuke could easily defeat Madara now.
Sage Madara:
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Sasuke cannot defeat this version of Madara alone. He needs Naruto to do.
Sage Madara = Sage Full Power
Sasuke and Naruto = Sage Full Power
After Sasuke got half of Hagoromo's power, he became stronger than base Madara, but not stronger than Sage Madara. Sasuke has been shown able to compete on the same level as Sage Madara. The Hokages (Hashirama in general, couldn't even handle base Madara when he came back to life)... Sasuke is above this now.