If you're interested in tasting the different rums and rum creams, you might think about going on the Appleton Rum Plantation tour. It's included in one of the tour packages that the resorts offer (not one of the free tours). The tour was a lot of fun, very informative, and at the end, you get to sample all the rums -- unlimited samples!!
Before we went on the tour, I thought the rum creams were made by different manufacturers -- turns out Appleton manufactures all of them! (at least all that I have sampled). Sangters and Wray & Nephew are both made by Appleton.