I have only stayed at the Swan, but over many stays over multiple years, the place is just great.
The dolphin doesn't appeal to me with the lack of queen sized beds, nor the way the floors are set up. I get just plain lost in there and that's only visiting. It's just too large for me. We also had a corner room on our last stay there so we had one side with the boardwalk/crescent lake view and the other side watched the dock for the friendship boats between the swan and dolphin. Hours of amusement for my husband watching the boats.