About a year ago Ken Rockwell complained that his new camera couldn't get as good color as his old camera. I saw nothing wrong in his photos, he did. He solved it by applying an RGB curves adjustment. I still don't see anything wrong, but he's happy now.
Different cameras have different tone curves.
The D70 output you have seems to have a bit more green in it, as if it is trying to emulate Kodachrome or something.
The good thing is that the RGB curve can often be deduced from two photos taken of the same subject at the same time with two different cameras. So, if you could do this:
First, decide on the D70 setting that gives you the right color.
Second, decide on the D7000 setting that you intend to use for portraits. It's important that this one doesn't change - obviously, if it does, then the tonal curve adjustment will no longer be valid. (So if you go this route, you'll end up with one correction curve per shooting condition, roughly.)
Take two photos of two different scenes with both cameras. They don't have to overlap precisely, but must overlap enough to not confuse the algorithm. Basically, we'll blur both of them and then assume that we can use corresponding pixels to figure out the RGB curve.
Upload both here. The photos don't have to be bigger than about 800x600, JPG maximum quality, or thereabouts, so don't upload full 16MP - scale them down.
I'll take it from there.
