Duel: Archdevil vs Archangel

It seems the debate isn't too heated; few people are in favor of the Archdevils, but there are some. I think the creators of Heroes, just like the creators of Warcraft, decided to give humans some advantages. But the Archdevils also have their own unique strengths. By the way, what do you think, who is better: the Archangel or the Fallen Angel?