Lots of items on this and various threads about the price differences and there are, in some quarters, an assumption that EZY are cheap. I would agree that at times they are however not always!
Just booked flights for May 2013 from IOM-LGW. The price for 2 adults plus bags of 20kg each (no seat reservations) and given that the return LGW-IOM leg is the first Saturday of TT fortnight the FlyBe price was £256. For the same dates and at similar times the EZY price was £90 more expensive!
Apart from the price BE got the business because if there is a better chance that if the lunchtime flights get delayed or cancelled, there is hopefully space on a later flight. This would not be an option with EZY