Differences between MinimServer & BubbleUpNp server

[adhara]

Thx simbun

What can I do to improve sound quality ?

Currently:
NAS (minimserver/minimstreamer) ---> Chromecast (on my WISA hub (it s like a DAC)) --> hi-fi speakers

Possibility:
NAS (minimserver/minimstreamer) --upnp--> Zidoo Z9x --hdmi --> wisa hub --> hi-fi speakers
NAS (Roon server) ---RAAT--> Zidoo Z9x (roon ready) --hdmi --> wisa hub --> hi-fi speakers

Other ?