Logical sasuke fans accept his power isn't his own but you faps have major denial issues. XD
The fact is sasuke has itachi's eyes and the perks(boosted power & restored eyesight) that came along with them. They are permanent tools that he uses by default. Itachi's eyes are a tool just like Kurama is to Naruto and akamaru to kiba. Just because Naruto and kiba's are living entities doesn't change the fact they are tools that boost power.
Itachi's eyes are permanently in effect within sasuke, he can no longer "solo", as his power is not his own but the combined power/tools of another. Naruto simply has the better tool because his is living and he can interact with Kurama.