Blackbird/Don, RSSC Voyager and Mariner, and SS Shadow and Whisper were both built at the Mariotti shipyard, as I recall. That's not Blackbird's recollection. They really are peas in a pod, except for that darned bathroom design on the Mariner, which would certainly not keep me off the ship (have been on her 4 times and headed for more). Not sure where the Cloud/Whisper were built,as I have not been on either, but I am looking forward to Don's report, as he has been on the larger ships on SS and can offer a comparison. I really liked having different experiences on RSSC when the Diamond was around, having cruised on her 3 times, well knowing that the cabins were smaller. A smaller ship can bring a different atmosphere for some people, more to their liking. I never cared what ship I was on in the past, and hope NOT ever to be wedded to one....gets in the way of alternate itineraries!