YouTube user Shortbarrel Shepherd posted a very useful video that catalogues the differences between the real RATS Tourniquet and the counterfeit RATS that can now be found on the market. In short, the fakes are a mess.
The fakes have many material differences that lead to major functional differences and that certainly isn’t good when dealing with something purposefully designed to serve as life saving equipment. As is usually the case with knock-offs, it is easy to make something that looks like the original product but actually making something that works like the original takes real effort and know-how that the counterfeiter just doesn’t possess.
Kudos to Shortbarrel Shepherd for creating this useful resource. I have been a long time subscriber to his channel and I suggest you do the same. You can check out authentic RATS Tourniquets at RE Factor Tactical.