Hello Fuzuma,
Im also researching various topics and thinking in same line like you (which would be a better choice between the two ,EK or Flydubai? ). My understanding is that both are good in terms of salary (almost equal) and both are bad in terms of roster (80 plus flying hours and lots of night flying).
But since upgrade in Flydubai is faster than in EK (2 years to upgrade compared to 6-7 years in EK) I assume that someone who plans to spend lets say 5-10 years in Dubai would make a lot more money if he was staying in Flydubai providing that he gets an upgrade in 2 or 3 years after his start date. I guess most people would agree on this ??