You need to carefully check if all your QF flights earn EK skymiles
Look here http://www.emirates.com/au/english/s...aspx?#airlines
http://www.emirates.com/au/english/s...es/qantas.aspx

Earn most? "Most" for you will not be the same as most for me.
For you to check the earning and burning (using miles).
What will use the miles for?
And watch expiry rules in each program
Miles are not equal in different freq flyer programs