Roon can be very very good, but an App like BubbleUPnP, while not giving so many goodies like UI and DSP, can sound a couple notches better.
do tell, why would this be the case, all else equal (same setup, Roon properly implemented, jitter and noise management handled)??
i think my point to the op is by using the innuos zen mini 'starter' set, he is equipped to do comparisons for himself and find out