Hi there, Mark!
The Little Mermaid section in
Disney's new Art of Animation Resort is the absolute furthest building away from the main building. While you might face a bit of a walk at
Disney's Coronado Springs Resort, remember that the resort recently introduced an internal shuttle system to mitigate some of that travel. At this point, Art of Animation does not offer that kind of service.
If amenities are a factor, I think you would likely prefer the Coronado Springs Resort. As a Moderate class hotel, it will offer you more extras than Art of Animation, which is in the Value class of hotels.
The rooms themselves will be considerably different. In the Value Resort, for example, you will have two double beds; Coronado Springs offers two queens.
Theming is also much more elaborate at a Moderate than at a Value. The Coronado Springs Resort features multiple pools, including a children's pool, as well as a waterslide. The Value pools are fairly standard in their construction, although the atmosphere at Art of Animation's Big Blue Pool in the Finding Nemo suites is really delightful.
You also have more dining options at a Moderate than a Value.
All things being equal, it's my belief that you will be happier staying in the Moderate Resort. Make sure to tour the Art of Animation while you are there -- and have a wonderful trip!
See you later, celebrator,
-Deborah B.