I think BYC is nicer but, I may be prejudice as we own a condo at BYC. We looked at Xanadu, the layout is better at BYC. You have a better view of the Caribbean from all units. They have a gaurd on duty all night for your safety. Not that you really need it. You can walk to & from town by road or beach even at night. It's closer to town. They just opened a new restuarant with a third floor bar. It has a view of both sides of the island, so you get a glimpse of the sunset over the lagoon. The grounds & gardens are well kept. There is a great gift shop across the street. Called something ORANGE.
or you can check out the BYC gift shop.