Well, I just bought the Bathys 5 days ago and I'm delighted, plus I have some honest insight in Bathys vs PX8 (and also vs Radiance and Celestee)
Context: I had over the ear headphones in the past, but switched to IEMs around 3 years ago. I had some Sonys (forgot the model, dynamic driver + balanced armature, 300 euroish), then upgraded to Campfire Audio Polaris 2, then to Dorado 2020 which I used for almost 2 years with various sources (Xperia smartphone, Fiio adapters, etc). I got sick of cables and not-so-easy to use adapters on the go, and decided to get rid of them and get a good all-round TWS BT IEM (realising and accepting a SQ dip). I got the B&W PI7s2 which were great, but had bad connection issues.
I returned them for servicing after less than a year, and the shop decided to refund me. I wanted to buy some other "hifi" bt TWS pair, so I decided to go with the new Devialet Gemini 2. I went to the store to try them out - they sounded great, amazing fit. But before purchasing them I wanted to try out some good over the ear headphones.
The guy told me the hottest hi-fi BT headphones they have are the BATHYS and PX8. I tried the PX8. Sounded good, looked great, good build. But tbh I didn't enjoy them vs the Devialet Gemini 2 (which are IEMs). I felt the sound much less clear and detailed. I then tried the Bathys. WOOOOW. They sounded PHENOMENAL. I A/B'd them a bit vs the PX8. To any PX8 owners out here, sorry, there is truly no comparison. I used them both connected to my phone through Aptx HD/Adaptive. The PX8 simply sound much more narrow and congested. No comparison. I was shocked.
I then, just for fun, wanted to try other closed (wired) Focal headphones just to get an idea what the company can do. I was offered the Celestee first. And tbh, after 2 songs (I didn't have all day to spend there), connected to an iFi Audio Go bar they had on hand connected to my smartphone (Xperia, Tidal as source), I honestly can say I liked the more "meaty" and airy (I know, it's a NC headphone vs a pure wired one, but this is how it sounded to me, more space, somehow) sound I experienced with the Bathys (via USB-c to my phone, not BT). The detail retrieval felt the same.
Then I tried the other closed-back Focals they had, the Radiance (hate the bentley logo on it but hey, it is what it is). Yeah, now I could clearly see a step up. Felt much better especially in the female vocals (tried some Whitney Huston), soundstage felt a bit bigger and overall it felt it had more spark. It wasn't "Twice as good" or "night and day" by any means, but the price was almost double, and this is a clear step up (Albeit wired, no NC, no integrated dac-amp).
In conclusion, the Bathys are AMAZING! They didn't have other coveted high end headphones like the Mark Levinsons or the T+A, but at least compared to the next similarly priced headphones, the PX8, they are worlds apart.
So I went in to buy a 400 euros pair of IEMS (Devialet Gemini 2), but the Bathys (which were discounted from 800 to 700 euros) converted me to over ear, and were clearly incomparable to the PX8, which were much more discounted (570 euros). These are all Romania prices (Where I live).