dCS Mosaic Vs Roon Nucleus Plus - Titan

If you put all the right components in the chain ROON can still match the SQ.

On my Nucleus Plus I first used an ifi Lan iSilencer which increased the performance but later replaced it with a SmoothLAN network filter which took it to another level   After breaking in detail, soundstage and clarity was at another level 

I don’t have experience with Mosaic but I compared Roon to several native apps   While Roon is unbeatable when it comes to UI/UX, it falls short sonically in most cases when compared to streamer apps and proprietary processing. 

I also highly doubt there’s a sonic difference between Roon Nucleus models if you only use those as Roon Core without leveraging Roon DSP (that’s when processing power comes into play and you can benefit from an upper tier model).
To do Roon the right way I’d look into streamers that were also designed with a music server/Roon Core functionality in mind. Grimm MU1 is one example.

I totally agree with geardaddie.  I have no experience with the Mosiac app, but I  absolutely love my Roon Nucleus Plus with no plans on replacing it with the new Titan.  One thing I did do that was extremely effective in making my Roon Nucleus Plus quieter, therefore raising it's level of performance, was to add a neat little tweak called called, ifi Lan iSilencer.  I actually put one of the iSilencers on all three of the ethernet cables in my audio system to great effect.  Happy listening. 

I haven’t tried the new Titan model, but comparing the Roon Nucleus vs the Mosiac app I think the Mosiac app is slightly better. Quieter, with a more natural tone. However, I have closed the gap a bit by using an Innuous switch feeding the nucleus and Rossini. For me the convenience/user interface of Roon far outweigh the small sonic gains that Mosaic provides and so I only occasionally use Mosiac to play music…mostly just to compare to Roon and to make sure my Roon setup is not wildly out of whack.