To me it looks like the Diplomatic on the website. I should state that there is a Microsoft forum at Parliament House tomorrow and the hotel is very busy, in fact several Senators were on my flight from SYD and checked in before me. Like airlines my best upgrades have been when the hotel is 100%.
Keep in mind, however, the PL rep can't force the property to do anything. In my conversations with the GM of the PH MEL, they simply reward loyal guests based on number of nights and stays at the property and within the program.