Alex, thank you for this review and its great presentation and providing the raw files. I'd like to add a few points.
I played with the portrait raw files using RawTherapee, without using custom DCP profiles, but using dcraw camera matrices, which seem to be the same as Adobe.
I'd like to point that due to composition differences D800E file is in inferior position as portrait is captured in a smaller scale (illustration 1)
Additionally, there are some differences in skintones due to movement in relation to the light.
Lenses on both cameras were set at F11 which leads to different rendering of the DOF and overall image look, also in favor for sharpness in critical focus for H4D.
Nevertheless, this illustration 2 (http://minus.com/m2aWArEH6
) can be used for comparing skintones from both cameras as well as resolution. I added identical sharpening to both images.
As owner of D800E I am very happy with this result!:)
Attached in the zip file are the pp3 sidecar files that can be re-used in RawTherapee (version 4.9.50+)