If you notice, whenever Sasuke's powers are upgraded, Naruto's powers increase also. Example: Sasuke got Chidori and Naruto, Rasengan. Sasuke got Cursed seal and Naruto got one tail. Sasuske got Chidori sword thingy and Naruto had Odama (is that what they call it?) Rasengan and Rasen Shiruken (incompleted). Sasuke gets Mangyeko Sharingan and Naruto Sage mood and Rasen Shiruken (completed). And presently, Sasuke, Enternal Mangyeko Sharingan and Naruto, Kyuubi mood. So do you think both powers are even or one is greater than another. (Dont know if this thread has been posted before.)