Updated on 26 October 2022 - These wireless earbuds sound comparable to IEMs with the same price range. We inspect thousands of products and found out that great sounding earbuds cost at least $100 and advanced codecs may not matter in some cases for sound quality and we take it with a grain of salt, but kind of drivers being used and how they are implemented will matter as IEMs enter TWS realm. We'll see a lot more TWS IEMs and their driver setup is really complicated compared to mainstream consumer TWS (that tends to sound more universal). So you may find a truly distinct sound from TWS IEMS.
However, there is occasionally an exceptional case that $30 wireless earbuds surprisingly sound good and it comes with a compromise cheap build quality and short battery life.