He definitely is.
Sasuke has developed his Rinnegan far enough enough to jump dimensions which only Kaguya has been shown to do on top of that he has shown he can perform hand seals with one hand even while holding his sword - Lightning style against Kid Shin, and Fire style against Adult Shin, futhermore he used Amenotejikara twice in a few seconds with no sign of being exhausted even while being weakened from dimension jumping - He teleported Kid Shin, and then he teleported his sword back to himself.
Naruto was peirced by a sword, thus showing his reflexes/battle sense have dulled, which the Kyuubi pointed out, and Naruto admitted.