A CX cockpit in most cases has crew from different bases on all differing time zones and therefore making comparisons difficult. Hence the "time zone" rostering that was implemented several years ago that is fairly unique to HKG (yes an error in previous post of mine). I think you will also find that the other operators crews fly significantly less hours per month.
But when it no longer suits the operator because of a self induced crew shortage.....hey presto ......change the rules so the company can benefit at the crews expense......
We have to make a lot of noise about this because commercial gain is put ahead of flight safety with the authorities blessing.