Well, take home will be about the same (no tax here mate), but don't forget the pay is only part of the package!
Does Air China provide free accommodation?
Does it provide a 12% contribution towards a tax free provident fund (you get to keep the money)
Does it provide schooling for the kids?
Does it drive you to work?
Does it provide comprehensive healthcare and dental for you (and the family for a minimal fee)?
Do you get 1st class travel as an Air china Skipper?
As you can see, the package here is FAR better that Air China, hence Typhoons original statement, so indeed yes, they will probably have to up the package by another $100k before they poach many EK skippers.
Hope this helps.