All 4 ships are great. The Magic and Wonder are smaller, but they are still wonderful ships. I'd go more by what itinerary you want. The Fantasy mainly does 7 day Caribbean cruises. The Dream is usually sailing 3 and 4 night Bahamas itineraries. The Magic and Wonder have a bit more variety. The Magic does transatlantic and is in Europe during the summer, then is usually sailing Bahamas and Caribbean during the fall to spring, although it's doing some Canadian cruises in the fall now. The Wonder goes through the Panama Canal and goes to Alaska during the summer. In the winter, it's usually sailing Caribbean and Bahamas cruises, sometimes out of Galveston. Pick either when you want to sail or where you want to go, then look at what ships fit that.