Easyjet will spend extra money on fuel to make sure as many pax are happy as possible. Ryanair will make you rebook and then count it as 2 seat bookings and claim a massive load factor as ther merge flights. Easyjet will want you to use them again even though they are sometimes not as cheap. Ryanair will take you money and do everything they can to keep it while trying to avoid spending money on getting you there.