Tony Cordesman, in his review for The Absolute Sound,discussed the differences in sound between the two units. The review was not a direct side by side comparison but a review of the X1 and the XOno phono stage. I have not listened to the units side by side but have heard both of them extensively (I own an X0). They are very similair in sound with the X0 offering a little bit more resolution. Given the price difference between the two, it is a call only you can make. I recommend you try to listen to the two side-by-side and see if the differences are worth it to you.
