FO or Capt
I understand pilots at Vietjet have an ah hoc roster.
So you never know what your doing more than a day or so out.VNA has a 28 day roster, but expect changes, often. On a plus both Jetstar and Vietjet pay overtime. VNA does not! (Expect to fly +90hrs per month @ all 3)
VNA provide a seat on their metal within their network, upgradeable to business. VNA will feed you on their flts, dont think VJ or JSP? do. Otherwise same s*#t.
Expect on avg 7 days off per month at VN, others fly more efficiently so expect 10-12 days off.
Agencies MAKE a big difference so go with a reputable one.
Salaries can differ, medical insurance, loss of license, testicular fortitude when dealing with airline etc.
See thread by USMCPROBE on the matter (top of SE Asia forum)
If FO you can potentially pay for an upgrade. JSP 70% owned by VNA