This I think is one of the major problems of comparing lounges - what they are intended for.

SYD (and MEL) are intended for either passengers who are originating at that airport, or are transitting from fairly short flights. LHR is also in this category (although some of the inbound transitting passengers might have just come off somewhat longer flights compared to SYD or MEL).

HKG CX lounges typically has passengers coming off longer flights, going onto longer flights. Their needs are different compared to those who use the SYD/MEL/LHR lounges.

Different horses for different courses.

I have often argued that the SYD T3 QP is the best lounge in OW, because of this very thing - what is the lounge intended for? As far as SYD T3 QP goes, apart from PER and DRW, the longest flight is under two hours, and this lounge serves this market admirably.

Likewise, SYD FLounge serves its market extremely well, as does the CX lounges.

The real question here though is, does the SYD QF FLounge serve the market it is intended for than the HKG CX Flounge does?

Over to those wiser than me.

Dave