Just like the other said when you first start working for FR that on a Crewlink contract or workforce is crap. However they have this new think that when you join FR in you wages you get extra money that they give you for expenses i think its £1000 over 6 month. However Ryanair gets better when that you get you Ryanair contract. so if your not sick or late or have no shows for the first 6 months then you will get the contract. Then you have a basic wage. Ryanair pays more than most of the long haul carriers on there own contract (ryanair contract).
Plus there is more promotions in Ryanair and quick ones. after 1 year you can do the course to become a CSS (No1). Plus other opportunites in ryanair to be promoted. So depends what you want.