I prefer the Swan to POR or POFQ. It is a deluxe while either of the PO resorts are moderate resorts. The beds are amazing at the Swan and the location next to Epcot and DHS is awesome! The Swan is newly refurbished so the rooms are at their best right now. The grotto pool at the Swan is very nice as well. WE enjoy eating at Picabou, Fresh and the Fountain next door at the Dolphin. Walking over to the Boardwalk next door is a lot of fun in the evening, the buskers like to engage the little kids in their acts which is very cute.
There are some things that people occasionally miss when staying at the Swan/Dolphin. These are not Disney owned resorts so you cannot charge purchases in the theme parks back to your room, you do not get the Magical Express bus to/from the airport and you cannot book the dining plan. There is a resort fee of $23 per day and a parking fee if you have a car. If your rate is $190, you probably have to add the $23 to get the real nightly rate of $213. That makes a difference of $54 per night plus tax. Despite all that, YES the Swan is an upgrade - and a really nice one at that! MUCH nicer rooms, as well as location and amenities.
The transportation from the Swan or the PO resorts to the MK is the same - buses. The advantage of the Swan is the proximity to the DHS and Epcot. For the AK and the MK you use a bus. The Swan shares a bus with the BWI and the Dolphin. It is the second stop so there will be one more stop going to the theme park at the Dolphin and you will be the second to get off on the return after stopping at the BWI first.
At POR you will have 4 stops, at POFQ you will usually have only the one stop (unless sharing with POR, which is rare).
POR is a true Disney owned resort. It has lovely theming and provides all the amenities of staying in a WDW resort. It is very spread out so if you are in a standard room you could have a lengthy walk from your room to the main building where you have dining, shopping, boat dock and check in desks. Rooms are in buildings around the resort that have exterior corridors, motel style. Rooms are smaller but comfortable and located either in the Alligator Bayou or the mansions section. If you are in POFQ, the walks are shorter as the resort is smaller. It is a new Orleans Mardi Gras theme. The rooms are essentially the same in all areas with minor differences in decor.
PO resorts have a boat to Downtown Disney that many people love. If you stay at POR you can use all the amenities of POFQ and vice versa. A stay here is utterly charming.
I love all three and have stayed in all and would happily stay in any of these resorts again. However, if I were looking at the choice that you have, I would stay with the Swan. YMMV, however.
Good luck choosing!