Aurender or Lumin streamer only?

So here is my question.  I am interested in streaming using the dac in my Esoteric K-03xd SACD player.  Is there anyone that has used the Aurender N200 or N20 in comparison to the newer Lumin U2 in a similar situation?  Roon is not a driver and at this point I will only be using it as a streamer from one of the services.  Any specifice sonic or functional differences noted?  I will probably be using a USB cable between the streamer and the Esoteric.  Thanks.