Deciding between Saint Lucia and Aruba? Here you'll learn about the cost, attractions, and more to help you decide which is a better fit for you. If you're looking for a Caribbean vacation, where to go in the Caribbean, planning a trip to Aruba, or thinking about a trip to Saint Lucia, you'll want to compare these two tropical paradises. Their landscapes are pretty different, which affects what you're able to do on each island. Read this before planning your trip!