I was fortunate to do both this year. We did both basically with the same number of dives, staying at Divi Flamingo in Bonaire and Anthony’s Key in Roatan. Bonaire is a desert island, Roatan is much more tropical. Diving in both was very good. I preferred Bonaire, my buddy Roatan, but both were very good. The biggest difference for me was in travel. We flew on Continental and the flight to Bonaire was a red eye. So it cost us one day of diving on the end of the trip. Of course, you could dive after orientation on the first day, but the flight down wore us out pretty good. Hope this helps.