The answer lies in the HKG-AKL flights...
Only a four (or five) hour difference, so by our FTLs, it can never be an ULR operation, because our FTLs were written to cover our primarily East-West flying.
Surely a 12 hour sector heading 180 degrees is just as tiring as heading 090 degrees? How easily you recover from that sector (for the return flight) is another issue entirely, which is why there is Table X and Table R.