JVC HA-FDX1 IEM –
(About Same)
JVC HA-FD01
https://amzn.to/4bBUtYI

Difference: (Just Official Mod Tips),
instead of Titanium & Brass nozzles, it comes with 3 Stainless nozzles
1 nozzle is empty for stock FD01 tuning and/or modding, & 2 nozzles contain community tuned filters
Spiral Dot + tips (the best wide bore tips on the market IME),

FD01 even brighter & sounds more refine than FD02.
FD02 – only hang down earphone, no movable tip.

My Opinion:
Pros: sounds good, good bass
Cons: no exciting & punchy treble

JVC CLASS-S WOOD series Hi-Res sound source corresponding HA-FW01 (JVC Japan (Grey Import)
HA-FW01 – warm punchy bass, but treble too dark fr my taste
HA-FW01 is the successor to HA-FW1100
https://amzn.to/4bBhaMD

DROP + JVC HA-FWX1 Woody – bass head, Treble
Actually feels smooth to my ears.
‘Air’ is OK and attack is soft. Nothing harsh detected.
[A-lot don’t like this, due to specific music

Sony Mdr-ex800st – perfect bass
https://amzn.to/3wFwOrx