I will be a contrarian and say Congress Park -- unless your plan is to spend a lot of time at the main pool everyday. Keep in mind, you are only a 5-7 minute walk to the Springs.
For us, staying at Congress Park, gives many more dining and shopping options. The dining experience at SSR is less than adequate (IMO), and having a 10-12 minute walk to DTD is great (especially, if you don't have a car). In fact, we even walked to Cross Roads a couple of times during our last stay.