StallStrip,
Actual pay after Tax comparison
Perhaps there might be slight differences somewhere, but generally in Europe can be said: If you join as a contractor, you should pay:
Social contributions in the country where you are based
Income taxes in Ireland + a 'top-up' in your country of residence if local taxes are higher than Ireland.
It seems like most contractors still being charged the USC (Universal Social Charge) rate in Ireland, whether they like it or not.
If you join on a Ryanair contract, your employer
should pay the social taxes where you are based. The income taxes will be drawn in Ireland. Additional taxation may again be applicable in your country of residence to 'top-up' to the local rate.