Ryanair direct contract vs Buzz, Malta Air, Lauda, what are the group airlines?

Same aircraft, same procedures, same brand on the outside. Different employers on paper with different contracts by country: Buzz is the Polish arm, Malta Air covers a lot of the EU bases, Lauda is Austria, Ryanair UK for UK bases after Brexit. The contract terms differ so read which one your base is under. The job on the day is identical.