Monica, we are staying at the Swan this time because the Dolphin was booked for a convention! I would have preferred the Dolphin over the Swan because it's more festive and has the same conveniences you are looking for; Tubbi's, Camp Dolphin, etc.
I do prefer the Swan's bathroom set-up though, and the queen beds are nice (Dolphin has doubles.)
There's just something about the Dolphin that really stands out!
The Swan is more refined and elegant and is the smaller of the two making it easier to navigate the corridors. But the Dolphin, with it's cute lobby fountain will really catch your eye!
As you enter the Dolphin from the main entrance, make sure you look up at the ceiling to see a shooting star!