[quote=GuyYouWishYouDidntKnow]
Gil values objects, Iskander values subjects. In terms of that, their egos are equally large.
[/quote]

Gilgamesh values power above all, and believes all to be his property. He relishes being above all there is, and sees himself as factually superior. All is his domain.

Iskandar lives to the fullest, and believes in being the greatest conqueror. He wishes to take all by force because he is simply that badass.

Their mentalities are quite different.