As you have said, the lower fare is the initial estimate for economy and the higher is for what is called 'first' class.
The FAQ I note below states there will be the usual variety of ticket classes and prices but you have all the info the 'public' know at the mo ...
Baggage is 1 carryon plus 20kg for economy, 2 carryon plus 30kg for first.
See - http -
http://www.sainthelena.gov.sh/wp-con...-July-2017.pdf
for fuller info ...
I was booked on the May 2016 Atlantic Star flights and have been planning my 'Ham Radio expedition' to St Helena for a couple of years...
Comments on the mentioned Facebook site are from Rich Brown and (I think) Aiden Walsh, both from Atlantic Star Airlines ...