Well I did a side by side with Campfire Andromeda Emerald Seas, and UM Mest MkIIIs. about the same price point one BA and one quadbrid. It wasnt close not even a little, Base Mids, Treble, stagging, all biggly to the Mests, so thats why I am looking for a travel pair of Tribrids.....
I think the main problem with that comparison is the massive differences in the frequency response curve between the 2 models. I've attached a graph with the Andromeda 2019(green line) compared with the MEST MKIII(blue line) compared to my personal target(Harman with a bit less pinna gain), and you can see the Andromeda has much less sub bass, much more mid bass, and almost no pinna gain compensation. The MEST MKIII has much more conventional sub bass and mid bass, and while it still is missing some pinna gain it has a bit more than the Andromeda. I also included the Zero Red(red line) you have coming, which is a classic Harman-like tuning with a couple of tweaks to the sub bass and pinna gain regions.
In essence, even if there are audible differences between driver types the tuning differences would massively drown them out.
PS: I know the Andromeda 2019 is not the emerald sea, but I checked and the frequency response curve is pretty similar. I just picked the 2019 because it was measured by someone who also measured the MEST MKIII. I also don't have the knowledge to definitively say whether there
are audible differences between driver types or not, although I personally doubt it.
Edit: Forgot about staging. I can't speak to that either, because I don't know how a good soundstage illusion would look on measurements and I happen to be one of the people who doesn't get much of a soundstage illusion with anything.