when you get to a certain point, certain price point IMO nothing becomes better or worse, but different really they all play on the same field but have ''differences''. so its really hard to say one is better than another they have different aspects they bring to the table.
I'd pretty much agree with this. At that price point "most" iems have low distortion, "smooth" frequency response, good design, etc. It's just that the multiple drivers might help give more bass or the signature is a different shape. I for one prefer only very neutral, flat graphed earphones/headphones. However, that doesn't mean I think something like the shure 535 is bad. In fact, it sounds excellent. It ultimately wasn't for me, because i like extended treble, but that can be good for some people that find treble sibilant or harsh. It gives an iem a more comfortable sound sometimes. Same with treble. You might have low bass, but some people like that, because it brings the details out in your face more so you can pick out every little nuance. I just prefer a balanced overall sound myself.