We have stayed in both Congress Park and Paddock. Both were great.
I have to give the edge to Paddock because of the new pool (but we loved the quiet pool at CP too). We were there in August and were lucky to get a view that faced toward MK, and from the 4th floor we had a magical view of Wishes. Surprising how well we could see it. But the chances of getting one of the few rooms that faces that direction, at that height, not high chances.
The DVC resorts thread has a great discusion of SSR, complete with everything you'd ever want to know (and more
about the different villa areas.