Back in 2017 I tried the 64 Audio, and Ultimate Ears flagships, as well as all of the JH Audio earphones. My significant other at the time liked the Lola the best out of the JH Audio line, bust was mostly interested in over ears. I also had the Lola as my favorite, and went back and forth a couple of times with each competitor listening to the same songs.
I now own a JH Audio Lola, and going to Rocky Mountain Audio Fest this last year had the chance to compare them to the Westone flagships, Campfire Andromeda, Vega, Come, Shure SE 846, and Shure KSE electrostat, can't remember if it was the 1200 or the 1500.
Of all of those comparisons, I still liked my JH Audio Lola:
-Shure KSE did vocals in a way I liked better. Like adding clarity without sibilance.
-Campfire stuff was nice to see and feel, but would have occasional sibilance I didn't like.
-Westone models seemed like they would be more comfortable as customs since the tip would be soft, but the sound seemed overly smooth. (Little less definition, no sibilance.)
If I did it all over again, I'd not bother with a custom monitor as the three versions JH Audio sent me never fit as well as, and were larger than, the universal version. I'd go with a Westone if I wanted to try a custom again, the KSE if that cable were small and supple and didn't require an extra box, or the Lola again because I think going forward it will likely appeal to even more people as JH Audio is probably working on a 3 way EQ to get that last little bit of frequency response tuning available for users preference.* (I add a few DB of bass.)
Oh, and the Lola has started me on a journey to find the speaker equivalent... I'm now on my 5th pair of speakers, and will likely have to spend $10,000 to get something on par with the Lola from a frequency response standpoint: No audible defects to my ear, the right amount of bass from midbass to sub bass, no peaky trumpets or sibilance, not smoothed or too warm.
*JH Audio cables have 4 connections to each earpiece: Ground, mid, low, high. Theoretically an outboard "crossover" could be made to further refine or adjust the circuit for lows, mids, and highs independent of each other... Similar to the JH3A which had an external crossover. Their connection is also superior to anything else I've seen, and I think UE finally has a competitor, but it's only 2 pins.