The Swan.
There are reasons to choose POFQ though. If you think the theming really appeals to you, or you plan to spend a fair amount of time at DTD (as opposed to Epcot/MGM). At the Swan/Dolphin, you'll need to pay for transportation from the airport if that's how you're coming - so you have to factor that into the cost. If you stay at POFQ, then you can use ME if you don't mind not having a car. Also, POFQ has a fridge, the S/D have mini-bars. So you'll maybe have a car and can get some groceries, but not perishables. Also, POFQ is Disney - S/D is technically not - so S/D soaps in the room instead of Mickey ones. Not a big deal to me, but other DISers have said they miss them.
Both have great pools. POFQ is also a more compact resort. The bus service from each is probably comperable. The S/D often only goes to these two resorts, but sometimes also goes to BC/YC and/or BWK. POFQ's buses go to POR.
The S/D's location is great. I really love the walk to Epcot past the BWK.