Giving them the ability to perceive Limbo means Madara doesn't stand a chance in hell. If they can perceive it, Sasuke can use Iso Susanoo to armor PS onto Naruto's Avatar, thus Limbo becomes a non factor. Limbo smacked around Bijuu, Sage Kurama Avatar armored with Perfect Susanoo is far more durable and more importantly, far sturdier than the Bijuu. Limbo isn't going to do anything to it at all, that just leaves whatever techniques Madara has with his one eye, and Hashirama's Sage Mode and Mokuton. The best he has would be Shinsuusenju, and that already proved to be enough to disable a weaker PS Kurama at the cost of it's firepower. The stronger PS Kurama destroys it, and then Sasuke and Naruto kill Madara.
Oh yeah, and Gedo Mazo is a non factor once Susanoo comes out, as it can't drag in Susanoo as it's not a Bijuu. It gets blown to shit along with Madara.
Mid diff win for the boys.