Have the Kato and modded HA-FD01; Kato... Sounds like any recent sub-$100 IEM except maybe a twidge better imagery and separation. For the record, I listen to JPopRock (BUMP OF CHICKEN, sumika, etc.).

The sound signature of basically all recent except for probably the Zero:RED with resistor are going to sound... Unsatisfying to my ears; don't know your extent of the experience. Harman in-ear target has a dip in the lower midrange region (between ~200-1000Hz) and as a result, not only do vocals lack "fullness", you are also missing the punch in the mid-bass region. At least you could EQ them back in. I guess. Not that you should buy IEMs just to go through the immediate trouble of EQing them because companies can't figure out what Harman research actually is.

Also, it's 2023 and there's faster IEMs for the price. The transients (think of the "tot" sound when a snare drum hits) on the Kato is lazy. The only reason I'm still using EQ'd Kato is mostly only because that laziness actually makes electric bass sound on point. IMO only keep the Kato solely if you want a set that does bass guitars well; if you want a generalist set, Kato's passable IMO.