W60 is warmer, smoother, more laid back, slower and looser bass with a bit of spillage into lower mids, and thicker lower mids and smoother/warmer detailed upper mids, less sparkle in treble.
Andromeda is smooth as well, but faster, tighter, and with a more articulate bass and better control/separation from mids, leaner lower mids, more revealing detailed upper mids, and more sparkle/airiness in treble. Soundstage is very close in comparison, but due to more lushness and warmness W60 doesn't have as good layering and separation in comparison to Andromeda. It's actually very impressive how Andromeda does a perfect yin-yang of revealing detailed sound wrapped in a blanket of smoothness.