I thought to make it longer, I can't.
ASX are a
decent effort but
KZ can do better, I hope.
There is something deficient in ASX mids for me, some hollow/nasal quality, not that much, but apparent.
I do prefer AS16, C16, and ZAX to ASX.
At the same time, BA10, AS10, and especially AS06 are closer.
IEMatch really helps (ultra setting, especially) quite a bit: bass is a bit subsided, mids are more there, treble is shinier, so the impedance match is definitely an issue that may account for some difference in opinions.
I did spend quite a bit of time with the tips. Narrow bores (spinfit CP100 and my sets of hearing amplifier tips) did not work for me; to my ears shallow wide bores, such as spiral dots, still work best. Narrow bores emphasize midbass and cut treble for me.
Then on the perceived quality and internals, ASX somewhat feel scarcely TRN-ish, see the position of the crossover circuit board on my pair below:
I will still get C20 and BAX - two more tries, KZ