I'd have to listen to the two side-by-side again to answer that (and I don't have the Andro - it was a tour loaner). What I'm saying is that the ES3 is more balanced than traditionally V shaped, and not far off the Andro's tonality.
Although the graphs may overlap to strong degree, they are two different sounding iems(based on what I hear of them).
I would say that the ES3 sound characteristic is more polite with a more of an mid treble emphasis, but with not much weight in terms of the sound, it sound fairly thin in it's treble presentation, and spacially sound empty due to less presence of mids compared to the Andromeda. Andromeds has more of the mids, and lower treble emphasis, and has more of a body to the sound(is this warmer?). How the sound is filled is quite different as ES3 sounds fairly empty.
What I hear is two different personalities in sound outputs. I find ES3 pretty unnatural sounding, and the only real positive it standouts from some of the lower tier'd iems is the treble reaches further than a lot of them that rolls off earlier, but still, there are iems that has better extension in treble.
Why ES3 sounds polite is due to both having different band where the treble is emphasized(also, it reduces definition as the treble has no variety). Andromeda emphasizes lower treble which causes some shrill in the sound(which is the low point of it's characteristic although it does everything else very well). The shrill is similar to the HD800 6khz boost. So, Andro has a bit of an aggressive(or forward) characteristic due to emphasis in that region.
Looking at the graph, the difference in stage(ES3 sounding emptier) maybe due to upper bass differences.
