More questions...do you have kids and a wife that works? Have you spent some time in HK to see if you like it?
If your single and your primary aim is $$$ I reakon CX is your answer, otherwise the answer gets more difficult.
Both of them suit different people IMHO
JQ - Aus Basing, easy for partner to work, home nightly, schooling cheaper
CX- HK basing, harder for partner to work, lots of overnights, schooling V expensive
A lot of people that have spent 0 time in HK think everything is fine there, some people adapt well to it, some don't. We live in some of the least densly population parts of the world, parts in HK are the most densly populated areas in the world.
I've been there about 5 times, love it, to visit, I would never 'personally' want to live there. Check out the CX forums if you think it's a utopia any different to the problems faced by the operators in Oz. There are guys leaving CX to go back to the UK and the USA all the time, much the same as there are leaving EK as well.
Different strokes for different folks