You didn't mention your intent . . . to buy or to stay at those 3 choices you listed. Well, here's our opinion of each of them:
VWL has the best Christmas decorations - we've stayed there at Christmas and loved it! Not that the others don't, but VWL is really something to see decked out for the holiday season. Very hard to book for the first few weeks of December to due it being a low point season and the Christmas decor.
BCV is probably the most relaxing - and most sought-after resort in any season.
AKV's rooms are the most beautiful, but some of the amenities . . . well, putting it as best I can . . . aren't up to what the other resorts have (no quiet pools, no real walking paths, overwhelmed fast-food service at the Mara). If you have kids, great. If you don't, I would recommend either BCV or VWL.