Check this website for a comparison:
http://www.fracstats.com
It is run by an Executive Jet Captain and he has done a great job compiling the information. (It deals mainly with the US operations but I think there's some info on Europe, too.)
I flew Learjets for FlexJet for about a year...would still be there if I didn't have a call from the only airline I applied to. (You can tell that I was happy there because I didn't shot-gun the airline applications. I chose which airline I would like to work at and applied there. If they hadn't called I'd still be happy as a proverbial clam driving Bombardier products!)
Hope you enjoy the info --
--Former FlexJet driver!