They don't have the same goals.Naruto's goal is to protect the village/be hokage, then to turn sasuke back to the good side. He had to endure endless hours of training to get to the point he's at, and still hasnt reached his goal. Sasuke's is to avenge his clan. He trained pretty hard im guessing, but after killing his brother, he relied on the power of his brothers eyes. He pretty much just took a shortcut. Being the arrogant peice of crap he is, he now thinks hes better than everyone else bc he has awsome ocular powers. They have both endured alot, but i think naruto endured more and still has some ways to go. So if it's "one who endures" for his goals Then Naruto is clearly the better shinobi.