In my opinion you can't go wrong with either AKL or WL. We love both resorts - are heading to WL in 12 days with a bunkbed room. They offer different atmospheres - restaurants, etc. Having a savannah room at the AKL and waking up to the animals is special if you like animals. The kids activities are great there, also. It is nice to come back and really relax there.
Yet the WL is in the heart of MK so if you plan on spending a lot of time at MK it is probably a better choice. The lobby is similar in design to that of the AKL but the pool area, etc. has more interest at the WL than the AKL.