We haven't stayed at AoA suites, but we've done ASMu twice. From photos, I prefer the layout of ASMu. There is a large living room, two real closet areas, a nice kitchenette separate from the living space and plenty of room to spread out at ASMu with a larger couch and chair. AoA has 3 living spaces vs. 2 for ASmu. AoA also has the kitchenette right in the living room, and a small closet that looks like a high school locker. AoA does have a nicer dining table with room to sit and eat vs. the small round table with only two chairs.
For the lower price and more space to spread out in one room, I'd vote for ASMu.