CM as in Clearkote's Carnauba Moose?
I have a gallon...well, less than half a gallon now! of EX and I have noticed some separation, but a quick shake mixes it all back up nicely.
I've detailed cars using CMW and EX that are still beading after 4-5 months. EX feels a bit slicker though. For example, I just washed a Hummer H2 today that I had polished with PwC and sealed with EX on August 27th, and 2 months and 2 days later, not only is it beading like crazy but the paint is still noticably slick.