Re: CX S/O or EK F/O
After 10 yrs you'll be about 1 million dollors better off at CX...if you are a little clever with your money. The 'golden handcuffs' at CX (the company pays off a nice appartment for you with your accom allowance over 10 yrs) is the real kicker...at EK they point you at an appartment/townhouse and say "You live here"....until a few years go by and the rent exceeds what they want to pay and they shift you somewhere cheaper...unless of course they shoved you somewhere cheap in the first place.
After 20 yrs you'll be approaching a position where you can retire early if you wish...or keep working if it's still fun....for a few more years before retiring early with your own aeroplane to fly when the mood takes.
Neither Dubai nor HK are all that nice to live in...but HK beats DXB hands down in my opinion...and CX offers basings in nice places as mentioned above.
If given a choice take CX...if not take whatever is offered and make the best of it.