My confusion too. Was thinking of sending my 3Cs to Audeze to get Fazored, thinking that is the only difference. I expected a little clearer top end, maybe better imaging. I went to my local dealer and auditioned the first 3F, to hear if there was much difference. I then took those home to audition and A/B with my 3C in my system. Quite a large difference, especially in the bass. I suspected then that they had different drivers. Took back those 3F, and bought a new pair. Those still sound quite different than my 3C.
Maybe Audeze should have released them as a LCD-4, or there is a true LCD-4 lurking very soon. They would look very luxurious with ivory cups.