[magicalhippo]

You assume it's the same product.

If you order electronic components from China, you're never quite sure what you get. You might get the stuff that failed QA testing at the factory, or second-hand stuff that's soldered off some old PCB. Or sometimes you get something else entirely... I ordered some LM35 temperature sensors in the TO-92 package, and got some cheap transistors instead. Case was TO-92, markings where as expected for LM35, but a quick test betrayed what was really inside.

In this case I expected them to be fake, based on the price, I just wanted to see what I got. But even if the part is appropriately priced you can't be sure.