Despite having done similar things, Prometheus and the Serpent are seen differently in the cultures that believed they existed. Why do you think that is?

Prometheus stole fire from the Gods and gave it to humanity, and the Serpent gave the knowledge of good and evil to humanity by encouraging them to eat from the tree.
Both were punished by the gods.
Yet the Serpent is seen as evil, while Prometheus is seen as a positive figure, a hero even.
Were the ancient Greeks more mature in their attitude towards their gods by recognising that gods could be wrong?