Olster's or is it Olsters or Olsters' was spot on. Simple numbers of basic pay doth not paint even a small part of the work picture. The education allowance is a significant factor ( should it be applicable). Take your time and vet all three.
There was a large movement of QR pilots to (not EK) a few years ago. That trend has actually reversed ! Just a few but it is happening .
Good luck.