On our last cruise, which was now almost 2 and a half years ago, we did a move up bid from a CS to either a RS or a PH. We got the PH and got all the inclusions that go with the suite as groryjm said including the monogrammed robes which I understand they no longer do.
I am now waiting on a couple of bids for exactly the same suites for our October cruise and a PH just became available today. There was a RS available when I did the original bid which disappeared soon after.