What is really the difference between supermarket economy flour and branded flour?!

What is really the difference between supermarket economy flour and branded flour?

I tend to buy organic free range eggs for obvious reasons, lucky me I can afford that, but i was looking at the cost differences between supermarket economy flour and the leading branded flours and I was surprised at the cost differences: Even in the supermarket they have regular supermarket brand 34p/Kg and economy 21p/Kg thats a 10p per kg difference for the powdery white stuff but branded plain flour comes in at anything from 50p to 110p /Kg. Now I know arguably there are some direct costs involved in advertising certainly we the supermarkets dont advertise individual own frand economy produce with tv inserts where as a brad company might, but come on help me out is it really all profit? am i getting a better flour for 5 times the price ?

I used a supermarket that states it doesnt use GM products and I also assume that one cant be cruel in raising flour and a field is a feild to an ear of corn!

Most generic products are made by the same companies, in the same plants, that make the brand-name stuff. (Case in point: last year, PeterPan peanut butter and Wal-mart's house brand were recalled. They're made by the same plant.) I tend to go with - if the first few ingredients are the same, go with the generic, because most of the time, there's no real difference. (Some things - like potato chips - differ in taste, but that's really it.)