Ohh so black zetsu >>>>>hashirama????yeah ok bro.Lol
In the end he needed kurama to match, it doesn't matter if you think he didn't
Madara would win imo. Sage Naruto defeated 6pop with Kurama, and EMS Madara had Kurama as well. EMS Madara > SM Naruto. And yes I realize that just because Madara was stronger than Naruto at that time doesn't mean that he would necessarily have an easier time against 6pop, but I think that he would.