The difference between Naruto and Sasuke is that when Naruto lost he's either pinned to the floor like lil ass chump, left flat on his unconscious ass after Sasuke sparred him, or left crying on the floor after Sasuke sparred him yet again.
Sasuke lost when he's touched by Naruto's determination and admits his defeat with honor and still leaves the village like a boss with little to no apology after Naruto wastes more than 4 years of his life trying to bring him back.
Sasuke might have lost, but he's still the boss.