When comparing EK with other don't forget the 12.5% Provident fund contribution by company towards your package The other deductions of 5% Provident fund contribtion is in fact a saving , car loan ( its interest free) the Club membership ( EPC Voluntary but highly recommeended) . Other extras are the profits share ( not guaranteed , but is genarally given ) and the annual increment ( also not guaranteed but has been given) .
For crew who have kids or intend to ;don't ever underestimate the value of the education allowance. If you are provided comapany accommodation, take it as the allowance will not usually get you a comparable accommodation in Dubai.When in company accommodation you dont' have to worry for utilities and maintenance issues.
EY may seem to provide a higher pay packet but I'm sure you will find that in hand they would have to pay out of their own pocket to stay in a villa or the type of accomodation "generally provided" to EK crew. If you are married with kids you are eligible for a villa and if you are single or married without kids you get an apartment. If you are Capt you are entitled for a Villa either ways.
If you have a family EK is a probably a safer bet; Life Style, Educational institiutions , EK Medical / Clinic and Dubai Social life is more geared towards the Expats more so than Abu Dhabi
Regards
BM