The thing is Moony123 that comparison is not strictly correct.
With the un-mentionable you don't get a per diem in cash when you get to the hotel, the allowance is paid along with your flight pay into your salary.
Depending on the destination you get an hourly allowance from the moment you leave AUH until you get back to AUH.
In EK your per diems are paid in cash at the hotel (in most cases) whilst your flight pay is paid with your salary.
This is the difference is cash that you are quoting.
If you compare the 2 in the way I describe they are pretty similar.
Having said all of that I still think the allowances are way too low!