I have been on RC and Carnival...they were both great!! If you are looking between the two of those I think it would come down to which one has a cruise that is going to the destinations you want to visit on the dates you want to go, and who has the best rates! You can't go wrong with either of those IMO, but I have never doen a cruise wedding nor am I planning one, I was just a vacationer. Just my 2 cents!