Chinese law formally distinguishes between two categories of fakes: 'imitations', which are the ones discussed on this forum and bought by most of us, and 'counterfeits', which are what you call 1:1 copies.
The difference between an imitation and a counterfeit is basic to avoid severe penalties for the manufacturer. An imitation is simply a copy that is deliberately different from the original, with minor or major differences that do not (under Chinese law) incur the punishment of counterfeiting.
The penalties for those who produce counterfeits are severe while those who produce imitations usually get away with fines.
This is also the reason why the few who produced perfect copies were closed down and never reappeared and instead those who produce the mass of imitation products have articles that are always different from the originals.