I believe lots of those counterfeits are actually pretty hard to tell apart from the real product. I've had a Samsung charger that was almost a perfect copy, I wouldn't have noticed it if hadn't started smoking one day because the insides were melting together into a burned mass. There were some details (quality of the printing etc.) but nothing I'd ever have noticed. I've also had a Shimano MTB chain that wore out in 1/20 of what I usually get out of a chain. Not sure how many "this product is kind of disappointing" situations I've had that were actually due to fakes that weren't obviously fake garbage, but kind of ok-ish.