What is the difference between an Jetstar and Virgin Blue flight?

Personally, I would fly QANTAS, but if you want low cost flights, you're on the right track. I can't help you with refreshment prices and stuff like that, but I can tell you that the flight quality will be the same. Pilots all go through the same training and I'm positively sure that neither of those airlines hire flight school drop-outs. I've flown with over 20 airlines around the world and I've noticed no difference apart from a few landings being smoother.