cool people mover thing... my guess is Carnival will always be a day late and a dollar short when it comes to real originality... RCCL seems to always be the leader in the newest designs and size...not a bad thing necessarily..
2008-Valor and Glory
2009-Spirit and Splendor
2010-Freedom of the Seas and Mariner of the Seas
2012-Allure of the Seas and Navigator of the Seas