You are right. THe only difference is the deck location. We have stayed in a 5 and 6 and they are the same. I like the cat 6 because they are in between the activity. Its a shorter walk to either Decks 9 and 10 (Outside) or down to Decks 3 and 4.( Restaurants, Theatre, Beat street) . Anyone that has cruised before can tell you about the wait for an elevator.