A huge amount of products are just generic Chinese products that have a brand slapped on it. If you’ve ever bought a random small USB device (i.e USB hubs, etc) from a major brand like LogiTech and others, if you crack it open it is just the same device as cheap resellers with a branded coating. It’s not worth it to many companies to bother manufacturing their own small tat so they just sub-contract out.
And sure, it likely works, but it’s the exact same hardware with the same capabilities as a product a 10th of the price.
The cheap Chinese stuff often uses knock-off ICs tho.
They can be fairly difficult to detect, and will work for a short time or under very light loads. But they will be nowhere near the spec of the data sheets.
They might massively overheat, not provide the correct currents or voltages, run at lower speeds. All sorts of corners being cut to turn a $2 IC into a 50¢ IC. Or a 50¢ ic into a 5¢ one
So yeh, might be the same PCB layout inside, it might visually look the same (or very very close) but the parts are likely to be counterfeit.
Of course, it’s also probable that name brands might be hit with counterfeit parts inside as well. Hopefully their QA picks that up
