Quality Control is what you’re paying for…

For pretty much any type of product where quality shouldn’t matter you can buy cheap, normal, expensive, insane.

100/1000 of cheap ones might have sleight flaws.

10/1000 normal may have flaws.

1/1000 expensive

And 1/100,000 for the insanely expensive ones may have a flaw.

So even if their optimal performanceshould be the same, the more expensive it is, the less likely the manufacturer lets subpar products out to market. Often it’s vertically integrated and as batches fail they get bumped down to a different label