The REAL reason for that is because Madara had no senjutsu chakra yet Naruto/Sasuke combined Frog Senin+Curse Mark+KyuubiMode+KyuubiCloak(Sasuke)+Susano'o into one power.Doesn't changed the fact controlling the Kyuubi is chakra taxing and relies purely on eye power and skill. In the end of the day Madara's Sharingan feats matched Hashirama's body feats
But...its still debateable considering Madara had a full power kyuubi and fully developed Perfect Susano'o.