In Egypt Air you will have the possibility to fly different types of aircraft and also long haul routes.
If you take the upgrade you will probably fly the same type on the same routes for the rest of your live.
On the other hand 2.5 times higher salary is a huge point.
Look at the rosters and the bidding system. Especially the bidding system has an enormous impact on your family life.
Tough decision. But what ever you decide: Make peace with your decision and do not look back