I did have a little audition of the P2 graphene model at my dealers. Unfortunately they were set up too close to the back wall so the bass was overblown, which was a bummer, as that apparently is where the new version is improved most.
Aside from that, I did *think* I apprehended an even more sophisticated midrange/high end than the original perspectives, maybe a bit more clarity too. But hard to truly tell under the circumstances.
One person in the long JA Perspective Graphene thread here upgraded his Perspectives to the graphene (or traded up) and was completely thrilled. Said the 1s were great, but the 2s are true destination speakers.
I can't afford under current circumstances to have mine upgraded, but I plan to when I can.