Well, bear in mind I haven't made it onboard yet or had specific training for them, with
DCL all that kind of training came the days before boarding and the first few weeks onboard. But, Im applying for the same role so its comparable. (So far) Carnival are much more about being there, seen and heard. On the go, high levels of energy, all singing and dancing - they call their cruise staff the 'fun patrol' (which personally, if I was a guest that would put me off right away). Don't get me wrong, Disney were all about that too, but things like safety came way before. Some of the policies are different and will be hard to adjust (if I get there). Questions from carnival were much more what big group games do you know, what songs and dances, whereas questions from disney were what qualifications/experience do you have what would you do in this difficult guest situation (but I applied for Disney almost 4 years ago now and so much has changed).
Ive done that, I enjoyed being challenged by guests on a daily basis but it got old. I want to be involved with kids again, not standing guard. However, within the kids clubs, DCL truly offer things that no other cruise line can and that might cause people to unofficially call DCL their 'fun ships': no where else in the world will I ever see kids faces when Mickey surprises them in mouseketeer training, I won't ever get to go to a pj party with Pluto again, I won't go surfing with Stitch, I won't become a detective with Goofy, I won't make flubber or cookies with 200+ kids while stuck out at sea, there will be no more dancing lessons with Cinderella or birthday parties for Donald (every cruise lol)...
One more thing, at Disney I never had to sell anything (yes we told people they could keep the Oceaneer band, but at the same time I told them they could return them and get their money back). Ive already been told that on carnival I'll be expected to promote and sell the youth programing's merchandise.
For me, as a kid (and probably now), my idea of a fun ship and a week long party would be the Disney one, but that doesn't mean I wouldn't enjoy another cruise line. At the end of the day both cruise lines want the same thing they just word things differently because they believe that that's what appeals to more people. That being said, I honestly never plan on going on a cruise for a vacation anyway haha!
As for CD's I know that on Carnival they aren't as high ranking officer, and they aren't responsible for as many people/departments as they are on DCL. For example on DCL the 'manager of youth activities' reports to the cruise director, on carnival the 'youth director' reports to the Hotel Director.
Carnival have an Entertainment Director who is above the CD and reading the role of the ED (on Carnival) is equivalent to the CD on DCL