I think just saying they are the same size and material doesnt necessarily 100% mean they are exactly the same. There could be thickness differences or as I have read from some of the dunu posts, there could be differences in the actual physical structure of the material. So I think its possible that it might not be the same exact driver, even if it is the same size with the same material. It still could be, just hard to tell from our perspective here. So it could be that, could just be that the stainless steel and shape of the atlas really brings out that bass, whereas the material used in the equinox and the internal shape may just balance that driver out a bit, who knows. I actually really love the z1r, but theres just this quality the andromeda (and to a lesser extent my old polaris) have that I really like, even though its maybe not quite as clean. And I do really enjoy the gold, and surprisingly to me they are actually one of the most comfortable pairs of IEMs I have ever worn. Just wish there was more rumble in the subbass. Bass was actually quite a bit more subdued than I thought with them, especially considering they have 4 bass drivers per ear. Seems to peak more towards midbass, and that subbass rumble I like just isnt really represented the way I would hope. May just be more of a ba vs dd thing though. I have definitely been tempted by the solaris and hope to try it out someday, but other than the fit, the z1r really ticks all my boxes. Its not perfect but definitely plays to my preferences. Though I am friendly with another user on the board here who is local and definitely ordered a pair of the special edition solaris, so I may get to hear them at some point relatively soon. Though I cant really say I would be looking to shell out even more money at this point.