For those who are curious about the difference...
Well, I'm glad I took the move and bought UCX.
First, the sound is more focused, clearer. Not that much... but enough to notice details I haven't heard before while listening to my preferred jazz /commercial reference album. ( Madeleine Peyroux,
Careless Love) The dynamics and the space "3D" is just "wow".
Second, the phone preamp drives my HD800 way better. In fact, I have to lower the level in Total mix. The responsiveness of my headphone (bass, depth, hi) is enhanced.
The dynamics really shine.
Third, but not the least..... it has the same performance as the multiface. In fact, the output latency is faster by a few microseconds. (UCX = 3.075, Multiface = 4.124) at buffer 128. Computer / Asio usage = the same. So don't worry about the "usb 2.0" limits.
Finally, the new Total Mix is really cool and easy to use. (as the old Total mix but with more "fun" added to it, and gizmo like built-in FX)
I'll do test for the preamp section soon... and let you know my thoughts.
(I have a great river ... so it might be a good test as the UCX pres seems to be uncolored on specs.)
Later!