I have compared Huffman ZX cables with literally dozens of other cables in A/B testing using all sonic parameters as a guide. The cables I have used for these comparisons are from Cardas, Mogami, Supra, Pangea, ASI Liveline, Kimber, Bybee, Furutech, Synergistic Research, Elrod and Shunyata.
After comparing many Shunyata cables with Huffman ZX cables there is no contest. Shunyata wins hands down -- across all parameters -- in my system and in other systems where I have heard them. This includes the parameters of detail, clarity and transparency. Huffman cables have a very definite signature -- a constricted sound stage and a sound that lacks fullness (harmonics). The result is SQ that lacks "naturalness", for want of a better word.
Huffman cables do not deliver "true to the recording" sound at all. They delivery what I would characterize as a "small" sound -- thin and constricted -- appropriate for less expensive systems, perhaps. To highlight these observations, if we are looking only at ribbon cables, if you compare the Huffman ribbon cables with Elrod ribbon cables (much more expensive, to be sure) it is very easy to confirm the same observations made (above) regarding Shunyata cables.