I want to ask a question. I am not discussing about the fake jersey. Just want to know how to differentiate between real and fake jersey

My cousin in England bought for me an original Liverpool jersey. I also got another friend who went to pasar malam to buy a Liverpool jersey which costs around Rm20+ or 40+ if i were not wrong. But when i compare betweenmy jeresy with my friend one, I spot no difference.

So anyone can tell me how to differentiate between a real and fake jersey?

The pic of my friend is in his house so i don't have pic. But we have checked every part and we spot no differences. And the seller in pasar malam told my friend that they smuggle from UK, meaning they sell original jersey at low price? Is it true?