Bucuti is definitely a notch higher than the Manchebo in my mind. ESPECIALLY if you stay in a Tara Suite. Same beach too in that they are next to one another, so no difference there.
We're going in mid-Dec, is it still a good time for the beach?
I am not sure why you would be concerned?
Average high temperature 87 F.
Average low temperature 76 F.
Average temperature 80 F.
Average water temperature 81 F.
Average rainfall 3.3 inches (20.3 inches annual)
Average windspeed 15 mph