It ain’t the quality of the airplanes the matters, its the quality of the pilots. How many hours of flight training do they get each month? How do they train and how hard? That is the predictor for how well they’ll do in combat.
...add how motivated.
The Israeli can not afford to lose one war, the Egyptians can always count on the UN to save their bacon if it looks like they are going to lose.
Under those conditions, as a pilot, do you risk it all or do you play it safe?