There is a forum on another site that may be better able to answer this. The Nuprime moderator made up a chart for that line in terms of SQ. He would probably best know how current models might relate to the NuForce models if they are the older ones. Keep in mind the companies separated more than 4 years ago now.
https://www.audiocircle.com/index.php?board=199.0
There is also a thread on the CDT-8.
https://www.audiocircle.com/index.php?board=199.0
There is also a thread on the CDT-8.