I think that Advance Wars 2 and Advance Wars: Dual Strike are better than any Fire Emblem game that I've beaten (4, 6, 7, 8, and the DS remake of 3.1), especially when you throw in multiplayer. Days of Ruin wasn't very good, but neither was Radiant Dawn. I'm going to give AW the edge for fun multiplayer and for how awesome Dual Strike is.
Dual Strike was really, really good. Agreed here.