All Gulf Countries are alike. It is highly recommended to go to a country where you have family or relatives. This is to help you have backup support if it takes a longer time to find a suitable job.
Here is the list of Gulf Licensing Exams:
DHA - Dubai, U.A.E
HAAD / DOH - Abu Dhabi, U.A.E
MOH - All other States/Emirates in the U.A.E
QCHP - Qatar
SDLE - Saudi
SCFHS - Saudi (Specialists)
NHRA - Bahrain
KDLE - Kuwait
OMSB - Oman
If you were to look for the easiest test to pass, this is the range from toughest to easiest: KDLE > NHRA, OMSB, HAAD & SDLE > MOH & QCHP > DHA
If you are looking for the least saturated, this is the range from most saturated to least saturated test takers: DHA > MOH > QCHP > HAAD > SDLE > KDLE > NHRA >OMSB
DHA has the most number of candidates amongst all the gulf exams.