My personal preference would be for the Beach Club, April.  Not only does the pool there offer a whole day's worth of entertainment in and of itself, but the food options are more accessible than they are at the BoardWalk.  At Disney's BoardWalk, all of the restaurants are located on the actual BoardWalk, not within the resort.  The Beach Club also offers its guests slightly less walking distance to Epcot than the BoardWalk.  If feeling pampered is your goal, you really can't go wrong with either.  As deluxe properties, these two resorts will both offer you the ultimate in Disney luxury accommodations.  Still, I think the Beach Club slightly edges out the BoardWalk in this case.  Good luck with your decision!