We didn't think the service was the same either.
One other thing I forgot to mention, in CC you have a full menu to select from. The breakfast menu on CC is a full breakfast menu (for your cabin) whereas the standard stateroom breakfast is much lighter-more continental I guess. Additionally, if you choose to have the last Gala dinner in your stateroom, the lobster and filet mignon will be served to your room. You may order off the San Marco menu.