You'd rather pay $100 for a flash drive to the guy that only makes 10% on them because of his low volume or bad logistics, than pay $80 for the flash drive to the guy that makes 50% margin because he's the high volume buyer and has great logistics?
Me, I'd rather pay less for the best, and if that guy has better margins, so much the better.
You're basically saying you prefer to buy from the company that adds relatively little value to its products in the form of good design, efficient production or good sourcing of raw materials.
Let's say a company found a way to create goods with negative raw goods costs - such operations do exist, usually by converting trash or waste into a desireable product. (E.g. sewage into fertilizer pellets.) Is that a less desirable product than one that has a lower margin?
Saying, hypothetically, "All other things being mostly equal" isn't really useful here I don't think. It's saying: 'assume the iPhone and SGSII generally represent the same value to people' clearly for a large portion of the people, they don't.
( I own a SGSI )