Anyway, the first poster hit it right on for your question.
I thought I would add to it. Laundry facilities are only in the Dolphin; so, if this makes a difference keep it in mind. Also, I prefer the restaurants at the Dolphin but you may get a vote split on the middle in that regard. I think for driving out to get around other parts of Disney, the Swan has a slight advantage of being closer to the main boulevard.
You may get moved to the resorts posting forum.