EK is a better option as far as their terms and conditions. You will be in the right seat for probably 5-6 years. If you are young enough then it is the best option. FlYDubai is a start-up and so is taking current/qualified DECS on the B737NG. The two big negatives working for Fly D are:
1. Inadequate Housing allowance.
2. Training bond of USD $24,000 & 3 years.
Interviews have been terminated until further notice.