Dis guy the true MVP tbh
Thanks for the comparison gif! I think this will help a lot of people to see the FR differences
EDIT: Also, please do note that my measurements and rig is not perfect. It only serves as a tool to give context on the sound
Anyway, as for my personal impressions, I noticed that the Andro S definitely has less treble. It does sound quite a bit warmer than the fu V-shaped signatured standard Andromedas. What I really like from these is that, due to the boosted mids, vocals actually become sweeter and more tonally correct to me. Additionally for some reason, if we're to believe this is just a standard Andro with more mids, the imaging becomes more centered and clearer. I always noticed some sort of haze when it comes to vocals with the Andromeda and this has none of the haze. I would say the imaging then has improved tbh. The stage is slightly lesser than the standard Andromeda but I don't think it's detrimental to the whole IEM because sometimes Andro can feel a little too wide anyways. This brings the soundstage to a very (personally) sweet spot when it comes to width. The tradeoff is really worth it imho.
This is, of course, my personal and subjective experience. YMMV