It all depends on how long you plan to spend working overseas.
FZ - if you would like to upgrade a little faster and then move back to your country for a DEC or other contracting jobs. FZ is not a long term career job. In the previous month 3 Captain and 2 F/o's resigned and thats just the start. This always is the case in a new expanding airline finding its groove. Upgrades currently at a drip!! possibly 3+ yrs for new joiners.
EK - if you plan to stay in Dubai and work LONG TERM. Single or family it doesn't matter the package far exceeds what is on offer with Flydubai. Not so much final pay but expendable income, provident fund, medical, staff travel, no bills, profit share... the list continues... worried about driving home from a late night long flight, company provides transport to and from home. EK command 5-8yrs at an estimate. EK Capt benefits once 10+yrs service far outway the hard earned slog at FZ over the same period.
The other great thing about EK is that you don't have cabin fever stuck in Dubai, you can get trips home and to other places around the world which give you a well needed break from Dubai.
Just my 2 bob worth