Thoughts on Kharma's new ceramic tweeter?

Thanks in advance for any comments on this. How does it differ from the modified Focal used in the Ceramique series (including the 3.2) up until now?
I also wonder if there is an upgrade path.
According to Charles van Oosterum the mod-focal is overall still the one you would want. Kharma are working on a replacement for the heavilly modified Focal (only the membrane is used) but are not yet 100% happy to have a ceramic 3.2FE Hf replacement.
Very interesting! Thanks.
I remember that the mod-Focal was used in the original ($70K) Exquisite 1B 5-6 years back.
If fellow audigoners going the the NY HE 07 show want to
meet, let's say 3pm Friday May 11 by the Focal-JMLabs exhibit (usually associated with Sound by Singer).
Maybe the same time Saturday.