Andromedas not as detailed as the ER4? Yikes. Apparently they too suffer from the BA timbre weirdness despite having multiple drivers.
BAs are inexpensive and can offer superior impulse response in many cases but they kinda smudge some of the textural detail, especially on full range BAs, leading to a somewhat artificially smooth timbre.
The Er3 and ER4 uses single BA and I I don't hear any of these "weirdness timbre" problems. In fact, I think that the timbre problems are due to the Frequency Response of the IEM.
I've heard C.A Andromeda, but I didn't think it's worth even a quarter of the price. It is a common V-shape with good bass, recessed and dark mids and high treble. In some recordings, the highs even bother.
I found it does not compare to the naturalness and fidelity of the ER3XR, both stock and with the 75ohm adapter (the sound is virtually identical to the ER4XR).
I have the opinion that no IEMs worth 1000usd or more. What is usually seen is the manufacturers putting several BAs in the earphones and raising prices, but the results are bizarre Frequency Response Curves, in terms of Fidelity (neutrality) Real jokes ...
Take, for example, the J.H Layla II, which they claim to have "reference" neutral, costs $ 2750 and has this disgusting Frequency Response Curve:
Prophile 8 is also said to be neutral, but look at this graph compared to ER4XR. I do not see this as an upgrade to ER4XR. Despite it have what I would consider a good Frequency Response, it has elevated treble and a little recessed mids, compared to the Ety. So, it's good, but not better, in terms of neutrality.