Lumin D2 or Aurender N100H

Both are discontinued 2015-2018 models and currently selling at a similar price ($1200) used.  Features wise: 

1. - Digital output: BNC only for D2; USB 2.0 only for N100H
2. - Power supply: 35VA external LPS for D2; 35VA internal LPS for N100H
3. - Build-in SSD: None for D2; 2TB for N100H
4. - Build-in DAC: Wolfson dac for D2; none for N100H
5. ...

I'm less concerned about the differences in limited features and more curious about your preference or pick in terms of (1) sound quality, (2) app usability as a streamer and (3) should I be saving up (up to $2500) for newer models if the upgrade in sound is justifiable? I’d appreciate your thoughts, especially from those with experience using both.