I'm trying to decide between Dolphin / Beach Club / Yacht Club and Boardwalk Inn. I thought a map of the area might point out some advantages or disadvantages to the locations.
What are you looking for? To be closer to EPCOT or MGM? All are within walking distance of both parks. This is my favorite area to stay in since we spend more time in these parks and there's plenty of restaurants and entertainment to keep you busy at these resorts alone.
All of the resorts you mention are very nice. I kinda prefer the S/D for personal reasons. Also stayed at BC and had relatives that stayed at BWV.
It's about a 5 minute walk from the BC/YC, the hotels are next to each other. But, why would you stay at the BC/YC over the Dolphin? The Dolphin is a great hotel and even more convenient if your conference is there...(not to sway your decision on where to stay or anything)