No he didn't. Fukasaku couldn't combine with Naruto because Kurama wouldn't allow it.nope it's nowhere stated
naruto didn't SM all alone he did had help from fukasaku correct me if i m wrong
With regards to the OP. Naruto is superior ever since he mastered the rasenshuriken. His chakra control is further augmented by sage mode, where Naruto was capable of making the rotation and chakra of the rasenshuriken denser, faster and was able to throw it. That takes kage level chakra control.