Glad you started this thread. Yep, I own both, infact on our 4th D200. I would suspect that a bit of a fiddle with the Nikon Photo Controls in the D7000 would move color and casts in the direction you like.
The D200 system is a bit simpler, and surprise, surprise, that is why I rather prefer it. Given I add a little saturation when the images are loaded in to Aperture 3 I guess the D200 is probably not as saturated to begin with and it could be what you are seeing. (although that doesn't explain the Magenta casts in he D7000.)
But I love the D200's: Handling. It is a bit bigger for my old hands. I don't use battery pack, but L bracket for vertical shooting. One less thing to get in the way. I love the AF button on the back, it sits where my thumb is. The pretend one on the D7000 makes my hand ache. I love the Mode switch being a button press, the dial on the D7000 always seems to have a mind of its own and moves about. (I tape it down). I love all the focus modes on the D200 and find it to be more consistently accurate for my type of work. Image quality on customer prints to 30" are for all intents and purposes the same. I love that it doesn't do video, if I want that, I use a video camera. Horses for courses me thinks. Find I can use 800ISO and Nik Define 2 for lower light conditions. (used to shoot basketball)
And finally I just love the camera period. Owned a D300s for awhile, but couldn't find any advantages in our work.
Bit gushy I suppose, but the camera works for us.
.. I set out to discover the inventions of God. -John Muir