@jrareform Sorry, I missed your message and couldn't respond because I no longer had the CC registry.
FWIW, the Rivo Plus (RP) is more neutral than the Zen Mk3. They're neck and neck sonically, but the RP has slightly better detail retrieval, while the Zen sounds a bit fuller-bodied. Notes from the Zen linger a little longer, but the RP is by no means lean. Their soundstages are almost identical, but the RP images slightly better, especially in the lower registers. Both have excellent midrange and bass performance as well as dark background.
The violin sounds sweeter through the Zen, whereas the RP sounds more realistic, especially when paired with my Denafrips Hestia preamp. Overall, I prefer my first system, where the RP resides.
That said, the Innuos Sense app performs much better than Volumio. Because of that, I think the Zen Mk3 is the safer choice in terms of user interface and overall sound quality. RP has far more digital input options than Zen though. Good luck with your search if you haven't upgraded yet.

