Viking Ocean vs. Crystal Cruises Crystal Cruises rates as a true luxury line, while Viking Ocean Cruises is labeled ultra-premium, but the two lines have a lot in common. Both operate similarly sized ships and itineraries around the world, feature multiple dining venues covering an array of cuisines and cater to well-traveled, mature passengers. Each is a good fit for passengers who want an upscale cruise environment on a ship that's big enough to offer plenty of choice. Below, we pit Viking vs. Crystal Cruises to see how the two lines differ and help you choose between them.