First, no-one seems to have considered that maybe easy can afford 737 sim time for evaluations, whilst the A320 sims are under pressure of time for training and testing, nor that they're probably getting the 737 sim a lot cheaper...
But in reply to the Ambulance, who wrote:
Their philosophy is that the Boeing sims are possibly the only time in your career with them if you go the Airbus route, that they can see you demonstrate the pure, raw, basic skills that you possess to aviate, navigate and communicate. They want to see silly things like showing that you can actually trim an aeroplane in response to power-pitch changes, whether you can fly a raw NDB profile with just a needle and no map etc. They want to see whether you're a pilot and not just a systems manager.
I would wonder whether, to be a good and competent A320 pilot, you need those skills, and indeed, whether, in the course of working as a good and competent A320 pilot, it's possible to retain those skills anyway?
I tend to agree that, if you're hiring experienced bus crews to fly the bus, then it's probably a better thing all round for the sim check to be done on a bus...