I have both the Roxanne UF and the carbon fiber CIEMs. IMO while the sound quality from the UF is 9.8 on a scale of 1 to 10, with the UF I always know I'm wearing 'earphones'. In addition, I haven't found any tips for the UF that don't begin to make my ears itch after an hour or two. The SQ is great though. YMMV.
IMO the CIEMs sound quality is 9.95 compared to 9.8 via the UF. I do find it really hard to discern between the two from a SQ perspective though. Yet, now when deciding between the two to listen to, I always choose the CIEMs. First I have worn and do wear the CIEMs for 6 hours plus with no fatigue and no ear itch. I literally forget they are in my ears. And the SQ is to die for. I think probably because the CIEMs are so darn comfortable and consistently seal so well I give the SQ edge to the CIEMs.
In sum, the Custom Roxannes are so amazing that I rarely listen to my other high end phones now let alone the UF Roxannes. Just one person's opinion...
Cheers!