It is a shame you don't have the chance to listen to more iems with it. With the very different power draw and output testing the two with just the Andromeda won't do it justice, not to mention these aren't supposed to drive a 990 pro.
Would be very subjective for ones to rate DAC Amps with just one earphone and one headphone and if you are returning used items this way this is an abuse of the system.
Do remove the seller link as it is against forum rules too
Why in the hell should I try more IEM if I have and WANT just that?!