I understand the test you are suggesting but it may be a bit hard to pull that off.
This whole thing started with me asking myself (and yes, I know, only I can answer myself) whether or not I really need both lenses in the same range, given the excellent performance of the 70-200/f4.0. And the answer to that comes down to another question: How much shooting do I do in low light situations in which stopping motion is the key factor. Truthfully, that is pretty rare for me. I understand that if your business is shooting rock concerts, and maybe even weddings, the answer is more likely "yes."
These,taken at 300mm with a puppy in full motion. Of course it is in perfect sunlight. But, nevertheless, it shows (at least in my mind) what an amazingly good job all of these newer Nikon lenses do. These lenses, combined with a camera like the D800, just give you an incredible range of possibilities and incredible image quality.