I stayed at POFQ last May and Dolphin 2 weeks ago, and I really liked them both. Dolphin wins hands down for the location (it is actually longer to walk to HS - 1 mile, and only 0.6 or 0.7 miles to the Int'l gateway, depending on whether you walk the Boardwalk or Beach Club side). Boat may be faster to HS, but you will beat the boat to Epcot every time because of the two other stops on the way. Because it is a convention hotel, the lobby was always pretty busy, and the pools are spectacular, but not themed in any way. I love the pools at both PO resorts for their theming, and you are squarely inside the Disney bubble (no Mickey towel arrangements with the Swan). The location at PO means it's harder to take advantage of other resort dining, whereas a whole bunch of good restaurants are within a short walk from the Swan, and they have some really good restaurants in their own right.
Price-wise, remember you will be paying a resort fee and parking, if you need it, at the Swan. The resort fee does include unlimited bottle water (I asked for a bunch each day from the front desk), so that's one option. Has all EMH privileges, but you won't get MBs. Dining was annoying because it wasn't 180+10 when I booked, it was 180 only. Hopefully that has changed, since you will get the regular FP 60 day window.
With my parent's military discount, we are booked at POR for this November... got super spoiled on this last trip with my husband, since he often stays at SPG properties when he travels for work and we were able to pay for our entire Dolphin stay with points.