Joker eraly on useds ety er4s and HF5 as reference, and considers that bass a neutral (as to my understanding). The HF5 is one of the IEMs I have that have the least bass, so it's all about figuring out where you are on the scale compared to his references. Other reviewers are good as well, but the bass level set to "referrence" is one of the consistent differences.
But with Joker, he has written so many reviews and can compare to just about anything you've heard that you can get a good idea from what Joker writes about the sound signature of any other IEM. He also does a pretty good job of relating the price to the sound quality, and doesn't fall victim to "FOTM syndrome". That Audio-Technica review is nice and thorough, but after reading it I still have no idea what any of those sound like, and I had no idea if he was describing $50 IEMs or $800 IEMs.