The circuit design of the popular Conrad Johnson PFR is for the most part an MC-10 in a CJ case with a remote control added.
The separate MC-11 phono stage also basically became the EF-1 that sold with the PFR.
The MC-10 has many higher quality parts than the PFR. This is not to say that the parts in the PFR are not of good quality, they are very good.
There was also the MC-9 which is line stage only version of the MC-8 (ie, no phono).
The Motif line was Lew Johnson's baby.