Good things come to those who wait... but I won't be doing a long writeup, I leave that to those with better reviewing/writing skills..
I did a first comparison between Bird and Fourte today, listening to a range of genres, and in many cases I did not have a clear preference for one or the other... They are both exceptional in terms of resolution / detail retrieval, staging and imaging. Fourte has more oomph in terms of sub-bass rumble and weight of low end notes, and sometimes sounds more natural to me. The Bird is very good in terms of instrument separation and layering, always in control, makes you feel like you are inside the music, the treble sounds smoother, eg cymbal crashes, and the overall tuning is impeccable. But overall I found the listening experience remarkably similar... I can listen to both for hours and enjoy every minute of it.
I have to admit that this is kind of sobering... I will do more extensive comparing, but I'm starting to wonder if owning both makes sense, and even if the (substantial) incremental investment vs the Fourte is worth it, for me. It's a different story with the LX for example, where the difference in sound signature is obvious, and I like having it for variety. Time will tell.. It's only been one week now. Not sure if it's fully burned in yet..
Other than @gLer, has anyone else compared these two extensively?
I owned the Fourte for about a year and a half, but itās been years since I sold it. To me the biggest differences between them come from their tunings. The Fourte has some interesting dips and peaks (imo) that really help create that holographic soundstage and sense of space whereas the Traillii has a more ānormalā tuning and still achieves a similar effect. I think due to the Trailliiās more āsaferā tuning it might not have as much of a wow-factor upon first listen, whereas the Fourte definitely grabs your attention immediately. If I were to have both IEMs and I wanted a friend to listen to one it would be the Fourte. The Traillii to me is like ultimate refinement and something I honestly feel like would go unappreciated to someone who hasnāt heard a lot of gear or didnāt really know how to pick out certain aspects of a tuning and what not.
Thatās about as much as I feel comfortable saying since itās been too long. Lol.