Bluesound node confusion

The 2i had better SQ than the 2

The n130 supposedly improved SQ a little, but it also introduced an HDMI input.

The n132 offers slightly better DAC, HDMI and DIRAC live support and they changed the headphones jack from 3.5 mm to ¼ inch.

I have a 2i on my basement system.

I have a n130 on my main system where the 2i used to be. I did notice a slightly more refined sound when I upgraded.

I've always used an external DAC so I can't speak to the DAC changes.

Had the 2i and didnt like it. Had an opportunity to get the N130 with upgraded power supply and its fantastic. Running it straight, no DAC. Added bonus is it can run Dirac room correction software. 

I use a 2i into a better DAC and get great results.

here's my question, I have a Bluesound Vault hooked up to my main stereo. want to be able to play this in sink with my new patio speakers running on a separate system. I tried using Y connecters from the bluesound to each system, get a ground loop issue. I could try removing the ground from one system, but also could get a Bluesound Node that would sync, am I correct? 

Also, I believe that from N130 (Node 2021) forward, USB 2.0 available as output.  This can be a big deal if your outboard DAC prefers USB over SPDIF or Toslink.