I think that the grip and dome of Plasma will be awesome, but I doubt there will be much difference in PLH because that's still the overmold. Plastics like Gstar mold up with lower wings so tend to be more understable, at least that's what I've heard. The dome from Plasma could help make discs less stable but I doubt it will be anything like an S-PD versus a G-PD, etc. because the Plasma is only in core.
Can anyone prove or disprove my hypothesis with profile pics?
I can't prove or disprove your hypothesis, however, I can say that while the overmold is a different plastic it does contain the same polymers as whatever the core is made of to aid in the bonding. In my experience this has translated to slightly tougher OMs on Proton plastic than Neutron. I have also seen at least one freak Crave that had a higher PLH than my other Craves, so there can be some inconsistencies even with MVP's obsession for perfection.