Carnival Corporation had two competing and very similar ship designs. Italian Fincantieri built Vista-class built for the Holland America and P&O Cruises and Finnish STX built Spirit-class built for Carnival and Costa brands; both were Azipod, Panamax ships around 90 000 gross registered tonnes.
The visual differences between the ships include:
Vista class ships had an external observation lift mid-ship on both sides of the ship, a wider forward and aft deck-width and a tiered forward section on the passenger cabin decks. Vista class also tend to have an additional upper deck just forward of the funnel.
Spirit-class ships have an alternate wide-narrow-wide-narrow-wide deck width along their length and a flat forward section leading to the bow of the ship with small windows
The hybrid design was first launched for Queen Victoria in 2007.
The Queen Victoria has a modified stern while the rest has a better modified stern.
The hull, bow, and stern of the Vista Spirit hybrid class are Identical(but the stern of the Queen Victoria is slightly different).