What is the differences between Peter and Edmund in ''The Lion the Witch and the Wardrobe''?

It would be easy to say Peter, due to the fact that Edmund betrayed his brother and sisters in the beginning. However, Edmund also was brave enough to come back and face what he did. Peter also made his mistakes in being overly judgmental and harsh on his younger brother. Both brothers had their own screw ups, but they also did everything they could to make up for them. If there has to be a better though, it would probably be Peter just for the reason that he was made the High King by Aslan.