I think it also depends on who will be in the party. For an adult trip, I'd go with Pop no question. We stayed there last fall, and it was great. Queen beds were nice, and I liked the added floor space from being able to fold up the murphy bed when not in use and have a table instead.
That said, if I were going with DD3, I'd probably choose LM if the prices were comparable. I think AoA has better theming, and the play areas are hands-down better than Pop's. Last fall's trip was with DS8 and DS10, and even they were wowed by the theming when we walked around AoA. DD would love to explore and climb on the cartoon play areas. I think AoA has more to offer kids (especially little kids) in terms of a "Disney" experience, but my adult self prefers the remodeled rooms at Pop.