I don't see why anyone would fake cherry shrimp since a) they're far from rare in the shrimp world and b) they're ridiculously easy to breed. These shrimp will change color depending on enviornment. Also, Cherry shrimp are Neocaridina denticulata sinensis var. red; there's at least var. brown out there too (sometimes called "natural coloration", or "taiwan blue shrimp" - I have some).