Carnival also owns Cunard, Holland America, Costa, Seabourn and probably others. No cross mingling of clubs at this time.
Just returned from 18th cruise on Princess, after 15, you reach top level but nothing to write home about...Bar in your room, but suites get this anyway, free ldry and dry cleaning, this is nice, and a few other small perks.
Love to cruise and looking forward to the next one.
Bob