Dedicated device between Laptop and Qutest DAC for SQ?

Yep.
Google has a similar product, didn’t when I bought mine, can’t speak to it.

In my case, the Roon Core uses Eero wifi to the internet, USB to one local device, either USB or Ethernet to another local device, and WiFi to several Eero nodes with MicroRendu or Ropieee boxes, in turn USB to the DACs.

I used to have Chord Qutest and added a DDC ( Digital to Digial Converter ) to get the best out of the DAC. Gustard U 16 DDC improves SQ few notches. However the big leap in SQ was when a moved from Delta Sigma DAC like Chord Qutest to NOS / R2R DAC’s , it sounds more analogue like with good bass extension and more realistic which is close to what the artist intended.

How is it possible to know this exactly, for even one artist never mind all of them?

Have been to few recording studios and it’s from my experience… for me NOS / R2R was way better than Delta Sigma and it sounded more like LP with good bass, best of both worlds.