I agree that high end shoes do not last as long ... they are just more delicate. Many luxe materials are not made to last, especially evening shoes. (Think about it, a cheap shoe with a wooden heel and rubber sole will just last longer than thin leather soles.) Manufacturers have the belief that if a woman is to spend $600 on a pair of evening shoes, she has the money to buy more than one pair and afford transportation to take her to the event (instead of subwaying it).
As for comfort level, high end shoes are more comfortable. The leathers tend to be more supple and mold to your feet better.
What I'm saying is that cheaper materials are "sturdier" ... but luxe materials tend to be much more comfortable.