A difference between the two is that in Genesis they mention one god and in the Greek Creation Myth they have more than one god. Another difference is that the Greek Myth is more dramatic and unreal. The Greek Myth had epic battles and in Genesis Creation story they didn't have epic battles. The battle on the Greek Myth was between Cyclopes, Hecatoncheires, and Titans.
Both Genesis creation story and the Greek myth tell how the earth was created. They both had villain archetypes. In the Greek myth the villain was Uran*s who wasn't a good father. On Genesis the villain was the serpent who tricked the woman to eat from the tree of life. Both stories also had hero archetypes in the Greek myth the hero is Zeus and in the Genesis creation myth the hero is God.