First post, because I literally just packed up my Unity Atom 20 minutes ago
Personal experience with 42 year-old ears, but like
@anTTony I got to demo the Atom and the Evo side-by-side in my environment (Evo 150, though), running high-efficiency Heresy IVs like
@Nicknick . For me it came down to this, sound-wise - the Atom had more clarity, but the Evo had more depth. I had to choose one, and after hours of back and forth listening, the Evo won for me.
To be completely honest, though, the features helped make the decision. Tidal Connect with MQA support was huge (I found using Tidal on the Atom via Chromecast or Air Play to be an exercise in torture) so if you go Atom, you're probably going to want to look at Roon or something similar. Everything about
using the Evo was a joy, and let me just use the apps I love (including Spotify for discovery, which Roon doesn't support, so I couldn't go Roon). I fought with the Atom, I danced with the Evo.
Sound-wise, I will miss the insane clarity of the Atom, but it was a bit thin in the end compared to the Evo, IMHO. Also had audible tweeter hiss, which the Evo did not.
Edit: Young family means all streaming all the time, and HDMI ARC was huge on my list, so I didn't really consider amps that weren't streaming-first and had ARC support.
Edit 2: Sorry, this entire post is an opinion on a science forum!