I received both the ePro TWS Series TW00 and the AZLA SednaEarfit Crystal's (that are meant for a standard TWS like the Galaxy Buds 2, Buds, Buds+) yesterday.
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I gave them both a try against the Crystal's that are meant for the G Buds Pro (deeper insertion depth) and the Final Type E's (for standard TWS) that have the bass I liked but kind of fell short in other regards.
First up were the Crystal's. When on the nozzle these things are much shorter with maybe a 1/16 inch sticking above the nozzle. They also have a lot smaller opening to the ear being ever so slightly bigger than the nozzle diameter.
Ok, those are better, they have further opened up the soundstage and separation. I don't think I've lost any bass, but I sure didn't gain any either. The mids and higher frequencies don't seem to have dropped off any, they just have more air. Recordings that were meant to sound closer to live with a little echo (Aerosmith- Movin' Out, Round And Round) are clearly better. More of a performance rather than a wall of sound being thrown at you. The downside, I might have lost a little isolation due to them not being inserted as deep into the ear. I'm good with the tradeoff.
ePro TWS Series TW00. Comparing them to the Crystals (meant for standard TWS), they have more material above the nozzle and have very close to, if no the same inner diameter. Looking at both versions of the Crystals then comparing lengths when mounted, the ePro TWS Series were about a happy medium between the two. In sound they seemed to match the Crystal's Bass but they fell short of the open performance and and tone.
Clearly I'm liking what I hear from the shorter Crystal's meant for standard TWS sets. I'm still waiting on the Acoustune AET07 from MTM audio but it's going to be tough to beat this version of Crystal's. What more could I want?? Maybe get back a little more isolation and a deeper bass without stepping on the other frequencies? Other than that I think I might be at the limit of what these Devialet Gemini's can produce without using different equipment or mods, but one never knows...