I can't remember what YT channel recently did it, but they compared name brand batteries, third party batteries and knock-off batteries (equivalent to Temu) for some power tools.

The name brand and third party batteries from actual companies both performed great.

The garbage knockoffs were not a "small difference in better quality control", they had completely different battery cells, lower capacity, missing safety features, were easy to overheat, etc.

Also look at the reports coming in from governments around the world on clothes sold by some of these companies. All manner of illegal toxins. You report them, the seller changes some consonants around and relists under the new name.

I'd encourage everyone to do their own homework on this if they really think the differences aren't significant. And the problem is unless you test to failure or send things to labs you don't know if you rolled the dice and got lucky or not, until your house burns down or your toddler gets a weird autoimmune thing that you have no family history of.