Actually if you know enough about the history of the Norse religion, Odin to Mercury is not a difference. Odin comes from Wotan who started as the messenger of the gods then gained prominence in the pantheon. By Roman times he was co-equal with Tiwaz and had acquired many of his characteristics. By Norse times Thor was still important enough to take the central position in the temple at Uppsala. However Odin was god of wars, aristocracy, and poetry. After Christianity took over, Odin continued to gain importance in the mythology (which was after all continued by poets telling stories for aristocracy) and by the time Snorri Sturluson wrote The Prose Edda was the familiar allfather, king of the gods, etc.