I think my older ears are preventing me from discerning any difference.
Don't get me wrong but to me Spotify on 320kbps is very impressive - we can hear a singers intake of breath and (not that we listen to much acoustic guitar) but we can hear the noise of fingers sliding around on frets etc. Not that we are really bothered by that level of detail as we listen to a lot of EDM which is often very complex and multi-layered but it's the bass that really does it for us (as long as it is well controlled and natural sounding).