The Sonicorbiter SE is based on a box we had customized by SolidRun. We are running a custom hardware and software solution so comparing it to an off the shelf Cubox with the free Volumio is not really an apples to apples comparison.
Also the Sonicorbiter CE has completed RoonReady certification so again this is very different from a free solution.
As for the Aries Mini I’m sure they will get RoonRady certified at some point but the Sonicorbiter CE has a lot more features
- DLNA renderer for use with jRiver and others
- RoonReady RAAT certified
- AirPlay
- NAA player from HQplayer
- Squeezelite
I like to call it the Swiss army knife of audio players since it supports all the most common audio playback protocols.
You can even load Squeezebox Server on it if you want.