I find each software has good points and bad points.
Roon it,s beautiful, fast, features are added in a regular basis, Room support is very good and has a very active user forum. Roon is also very stable and sounds very good, Mobile roon apps work perfectly and look good. You can serve your library to different devices at the same time and each one playing a different song including mobile devices, it gives the possibility of create various home users so they can have their own playlists and favorites . It’s a more complex piece of software, but very well made. It.s licensed in anual subscription model or a lifetime purchase option
Audirvana is a simple audiophile player, it is very easy to use, install and configure, if you serve your music from a NAS scanning wil be slow, even navigation on your music library covers will be slow, the sound is also very good and more musical than roon, stability is good not on par with roon, support is noting to grab about. The interface is practical not beautiful, version 3.5 will take care of the looks soon, it’s affordable and new major version updates are paid. The remote app for mobile devices needs a better user interface and more functionality, it’s a simple remote. Audirvana licensing is a per device only.
I currently use Roon almost exclusively, because it gives me the best experience.