Roon supports Devialet AIR

[Vivialet]

if the difference to a similar setup is soo big then I doubt that this is related to the source alone. I'm pretty sure it is a problem of the room and/or speaker placement. Also the speaker cable and power cables can make a much bigger difference than optimizing the source.
The basic sound balance has to be good before it makes sense to play around with the source. Try the hunecke.de calculator to optimize the speaker placement.