I was late to streaming and bought an open box Node N-130. I then bought a better USB cord instead of the cheapie I had laying around and it made an improvement. Then I went kinda crazy and bought a Teddy Pardo power supply that cost more than the N-130! And yes it made an improvement as well. Then I swapped out the pc going to the TP with a better pc and that made a difference as well.
Having said that, the U2 is 8.5 times the price as the Node and the N200 costs ten times the price as the Node! So yeah, they better sound better.
All the best.