We will be in a full suite with Premier on the Diamond in Dec. As far as I know, there is no Concierge Lounge for Suite on the Diamond, thus we figure getting the Premier is the way to go if we want to have the better grade wine or cocktails. And since we will be paying the crew appreciation, needed the WIFI, want extra specialty dinning, would like to participate Princess Prizes just for the kick, throwing in photos and reserved seating, the package seal the deal for us since we are going with our 2 children.
However, this is our first Princess cruise. So I am also unclear if there is any overlapping of benefits. But since I have paid for it, I am hoping the answer is no at least for Diamond. 😅