Went on an
RCCL 7-day eastern in 3/03, just returned from 4-day
DCL 12/9. About a day after we came home, our 5 year old son told us, unprompted, that he liked the kid's club on RCCL much better than on DCL.
We did land/sea, and thought that on the ship he would want to spend a lot of time in the club, giving mom and dad at least a fighting chance to relax, unwind from 4 days at WDW, and truly "vacation". Didn't work out that way, as he simply wasn't excited to be in the club like he was on RCCL. It seemed that he only really enjoyed his time in the club on the last day, when they did Buzz Lightyear's space goo in the Lab.
I think that part of the problem was the sheer # of kid's in the club on DCL. The kids had a "graduation ceremony" the last day of sailing, and there were literally hundreds of kids on-stage. On RCCL it seemed like there were at most 15-20 in his age group.
This translated into caregivers that were more like camp counselors - very energetic and happy, seemingly enjoying their jobs. The CM's on DCL seemed to be frazzled virtually all of the time due to the overwhelming # of kids. It must be incredibly difficult to plan and manage activities for that many day after day. Perhaps it's also a difference between 4 days versus 7 days in that the kids get closer to their counselors, but for what it's worth it honestly seemed like the RCCL kid's club was a more fun experience for him overall.
You mentioned having enjoyable dinners - what we did each night on RCCL was bring him with us to dinner, our servers would get his food right out to him so that by the time we finished our appetizers, I would run him up to the club and we could enjoy the rest of dinner and time afterwards. Worked out very, very nicely. On DCL we brought him to dinner with us, as that's what he wanted to do when given the choice between that and the club - to me that says something when a 5 year old boy would rather go to dinner with his parents than play at the club.