Have also been playing this weekend too!
IMHO on both colours i have tried a light blue and a dark blue doing half a panel with each both EX-P and EX with Carnuba look exactly the same. As does EX-P with a layer off EX with Carnuba on top.
However through a coat off nattys on top, and wow it looks wet!
I have picture on my ligh blue car with ex-p and Ex with carnuba on it, I havent finished the whole car yet so have not added the nattys. My mid to dark blue car I have done with ex with carnuba and topped with Nattys. On Saturday i tried the ex v ex-p on a panel both looked the same and topped on sunday with Nattys.
From what i can see both the ex sealants as other people have said have a very clear look to them and seem to take on the look of what is underneath them.
Pics will follow later when i get them off the camera. I preped the 306 ( light blue) with a polish with AG super resin, a coat of Megs hand polish and then VM, before using EX-P.
The 205 ( mid blue) polished with AG super resin, staright to VM ( my daily drive so wanted best results quickly!) a coat of EX with Carnuba and then topped with nattys 24 hours later.
I cant comment on which is more durable as i couldnt leave anything un topped long enough to find out! I do find the ex with carnuba **slightly** easier to apply and remove than the EX-p, but both are a breeze. Nattys wax is in the s100 easy to use catogory.