Notice the giant gate protecting Naruto and Sasuke from Kurama? That's not there anymore.And he did it with tremendous ease, dare I say, he did it neg diff... So I believe he would be able to suppress Kyubi.
Also, Kyubi would be a nonfactor in a 1v1 of Naruto vs. Sasuke, since Sasuke has been shown to have the ability to prevent Naruto from using the chakra.