Pierre Clement Variable reluctance pickup

Our friends Audio16 boys The Pierre Clement experiments are still on hold as other projects develop. 
So what is special about Pierre Clement? Its not the only variable reluctance pickup but most certainly the one that has the highest output at 20mv. Will discover on my grounds.
This gain? How does this factor when going into a regular phono stage sensitivity?  Will changing the input impedance of the phono preamp have an impact as it does on the GE VR pickups?  I have been surprised at the inconsistent sound I have heard from PC cartridges in various configuratons; from okay (even sub…) to mesmerising. I will make a dedicated phono stage for the purpose of my tests. 
So experiences and views will be appreciated here like that when I get around to this project I can kind of get a heads start…..thanks! 
But for now other projects await!
All fun…