I think this is not just something that chinese manufacturers do. I think it's something MANY companies do. Even the one where i worked for so much time improved their products (science and research machines, xray analisators etc etc) without even saying to people they were renewing something to improve their products. I think KZ just see the feedbacks around the web and tries to change the production on the go, so they can satisfy their customer that will sure buy their products again. Anyway, i'm gonna wait for someone to confirm ZS6 has different version. I've read many zs5v1 enthusiastic revisions and when i decided to buy them i saw there was a v2 version that sucked compared to the v1. Then i foused the zs6 but figured out people said it had piercing highs/big boost to the trebles, which i don't like. I really like my actual drivers (Memt x5) but i can't still enjoy the voices at 100% as mids are recessed. So in the zs6 i wouldh have less deep bass a more focus on the treble, which i don't like. Is there any comparison of the ZSR with the zs6 (grey version)? Are there some IEMS from kz coming out soon?