Only way Madara wins is if his V4 is that much larger and more physically powerful than Sasuke's due to chakra potency (assuming that V4 really does equal Base Mokujin, because that just came from it blocking Mokujin's hit at VoTE with it's blades and not budging an inch which isn't conclusive evidence). Cause then this would basically be EMS Sasuke+++ vs. BM Naruto. If it's just due to the size, then Naruto should eventually blow it apart with multiple Flash Bijuu Dama. Though entering CQC is a bad idea since V4 would dominate.