I had a long transit at HK today. About 6 hours. Tried both lounges.
Wing- Lounge is undergoing renovation and is partially open. It is located next to gate 2/3 at one end of the airport. The shower suites are ready and are NICE. I have used the shower suites at BA T5 ad LHR and these are much better. There is also a PC lounge that has 12 terminals. Besides this the lounge is very small as its being renovated. Not much space. Only wine and beer.
Pier- Located at gate 65, other end of the terminal. Large lounge with a LONG BAR with all the cocktail options. And a noodle bar. The lounge has a large capacity and is quite comfortable.