Originally Posted by ChampagneSocialist

Sorry I wasn't being clear - I did go to the Sakura Business Class lounge in the main building, and the lounge dragon took me to one side and said "Because it's very crowded in the business lounge, would you mind using the First Lounge upstairs". So I did go to the First Lounge. Physical differences - I guess there were lockers and better separate work/chilling/dining areas in the First Lounge? I had wanted to use the First Class showers but unfortunately they were oversubscribed. First food is still buffet service, I didn't realise see a huge difference from what is normally served in the Business Lounge.