I never said anything about clothes fitting better solely because of brand. The reason some clothes fit better than others is because in the last two years I've almost lost 3 stone (4 sizes) and so everything that was bought then, looks baggy, ridiculous even.
I only mentioned those brands, because that's where I'm looking for my gear at the moment, because some of there gear appeals to me. Such as this amazing tee from AA:
http://store.americanapparel.co.uk/2001sa.html?cid=200
However, I'm not an idiot and I am not prepared to pay that amount for that tee, despite how much I would love to wear it.
When I go to Georges or Primark, I can't find anything that particularly appeals, whereas the stuff in AA etc. does. Brand comes nothing into it.
The problem is not finding a store to spend money in, it's the actual getting the wallet out that is. This applies to pretty much any luxury item I purchase, not just clothes, but buying gear is my number one priority purchase right now.