I just got my DM6 a couple days ago and I am comparing it to the Andromeda S now and I needed to come here to share my experience in quick words.
(Rig: Tidal hifi + Topping DX7s)
First trying it with Music I like and now how it should sound.
Wiz Khalifa - On my level (or pretty much anything out of the Rolling Paper album) - This album has really good low, mids and "clicks" on high frequency that shows straight away if a gear is Hash.
DM6 - Volume -40dbs - the highs get to a point that "hurts" some times. lows are slight muddy, still really good. Mids slight recessed. Really good imaging.
Andromeda - Volume -50dbs (needs much less power for the same punch) - a bit more neutral and the highs are definitely there and detailed, but doesn't get close to "hurt" as the DM6. Lows and Mids are there and are really detailed, but not muddy or overwhelming. Imaging is amazing and clearly better than DM6.
Guns N' Roses - Welcome to the jungle (Master) - Guns has a lot of mids and highs
DM6 - Volume -40dbs - Again, the highs are really present here and detailed, but too much for me that overcome everything else. Lows are there, but not the best song to test lows, still really good. Mids more forward than the Andromeda. Really good imaging.
Andromeda - Volume -50dbs (needs much less power for the same punch) - a bit more neutral and detailed high that don't "hurt". Lows as per DM6, not the best song to test Lows. Mids are definetely there, but a bit recessed compared to DM6, but still really detailed. Imaging is amazing and clearly better than DM6.
(tried other things too) Overall DM6 is a really good IEM, but I can't ignore the "S" problem (singer using S or drum plates) on the highs that gets a bit too much sometimes., much better than my KZ AS10 though, but Andromeda S is still a better all around, but for the price difference and if you are not as sensible to Highs as myself, is definitely a great buy.
Really good post, mate.