This competition between them had begun ever since Enkidu had been summoned by Gilgamesh.
They were not always battles, sometimes they were bets or competitions, though in battles Enkidu has a greater number of victories.
While Gilgamesh had much greater raw power, Enkidu had much more technique and experience with his power, and he too had learned many things while traveling the world with Gilgamesh.
Of course the battle would change if Gilgamesh used his Longinus, however the King of Heroes did not use them as he wanted to gain as much power and experience as possible without relying on it.
After all, the Longinus were weapons that were used by the user to potentiate his power, what's the point of trying to potentiate if he doesn't have power for that, so, the stronger he is in his base form, the stronger he will be when using his Longinus, after all, Gilgamesh didn't like to depend on it.
