I think you'd be mad not to look at the Aer Lingus cadetship, which has just gone live.
cadet-pilots - Aer Lingus Careers
Whatever route you go down, if you want to work for an airline you're going to need to get selected at some point. I don't think I know anyone who wouldn't rather be selected before they commence training, rather than after. Life at FTE is pretty good, too!
Ultimately you'll be undertaking the same course elements wherever you train.
Good luck whatever you decide.