I would think that $1220 for 4 nights at the Swan would include UPH passes, but call DU to make sure. Swan/Dolphin and DU run specials all the time. Even if that price doesn't include the UPH passes, you may be able to get in for less before the time of your trip comes.
The Swan/Dolphin are very similar, but the pool is a little closer to the Dolphin and it has a more impressive lobby, a 24-hour cafeteria, an arcade and an ice cream shop. The Swan has the Westin hotels' Heavenly Beds and two sinks in the standard room. The Dolphin should be done with renovations by the time you are there and will have nicer beds too. The Dolphin has been a little cheaper, but I'm hearing they may raise their prices when renovations are complete.
There is no direct monorail service to the Swan, but you can walk through Epcot and catch it. It would be a pretty long walk, but at times it may be worth it. Bus service from the Swan is excellent. The Swan is the first stop, so you'll always get a seat.
The best thing about the Swan/Dolphin is its location. It's by Epcot and MGM. A short walk or boat ride to either, and the Swan is right NEXT to the Boardwalk.