One thing I've found for me is that the more expensive clothes fit me better. They just seem to have a touch more material.
Also, way back in this thread, someone mentioned the colors.
Perfect example-I was going to buy my son a Ralph Lauren shirt that was pastel (sherbert) orange. I pulled one out and it was $165.00
Now I'm not about to spend that on a shirt he'd wear and probably get beer all over, so the lady said-"This is our PURPLE (or some color) tag line." I went to another store and bought him the regular tag line for $60 something. There was a difference. The more expensive color was a softer hue. It WAS a better looking color. However, after he get's done washing it 10-20 times-they will look the same!
I saw the most beautiful Channel outfit. WOW was it expensive.
The skirt was black on white polka dots. I see LOTS of white on black, but am searching for the reverse.
If you window shop at the most expensive stores and develop your eye as to what is "high end" sometimes you can find something that will mimic the effect. I do buy a couple of high end items a year, but they must be classic and tailored so they will last a LOOOOOOOOOONG time.
I will NOT skimp on jewelry.