Thanks for the info. I can't comment on the gym facilities at either location, someone else can help with that. We've stayed at both resorts several times (always with a car.) CSR is really pretty, but it is a moderate, and probably technically is a motel because the parking lots are right next to the individual buildings. A common complaint about CSR is that it can be a trek to get to El Centro for food/shopping, any other hotel services you might require. That was never a concern for us because we didn't necessarily need to eat at the resort with all the other choices at WDW. Of course you can always drive to the main building.
AKL is really pretty spectacular from the aesthetic standpoint, and the restaurants are among some of the best on property. It can be a haul from your room to the lobby area, but you'll be indoors. A lot of folks enjoy the aspect of the animals which are visible from some room categories, and you can always go to the lobby and see them from there.
They are two very different experiences, both nice, just depends on your tastes. As I stated before, with a car, and minimal concern for the extra expense, AKL is a great choice.