@whart I have the X26 Pro and took advantage of the Black Friday Sale to buy the R26 which came Thursday. I hooked it up to my LAN and Roon recognized it without any problems. I burned it in for about 36 hours before I listened to it this evening. The X26 is connected to Roon through a Denafrips Iris DDC and a Raspberry Pi connected to an Etherregen. The R26 is just plugged into an ordinary ethernet cable connected to the same router as the X26.
So first impressions are basically WOW. It is a significantly different sound from the X26. I will need to spend more time listening critically to make sure that first impression holds but the R26 has a lot more presence, much bigger dynamics, and quite a bit more top end definition which surprised me. In many ways it sounds more like vinyl. Only downside so far is that midrange vocals might be marginally less weighty.
I was prepared for the differences to be much smaller, especially since I bought the X26 Pro at the same time as I got a Pontus II and I tore my hair out for 6 weeks trying to hear any differences and decide which one to keep. The difference between the X26 and R26 is immediately apparent. I'll report back after my first blush of enthusiasm wears off and let you know if I still prefer sound of the R26.