I am trying to set up exectly such a test and comparison for a few weeks from now. It will involve having an Aptus technical expert along on a shoot.
I look forward to it. I find it exceptional that, despite having just dropped $30K on a P45, you are willing to do such a test, and I am confident that you will try in good faith to do the test as fairly and as objectively as possible and let the chips fall where they may. It is what makes this site unique. No sacred cows; no manufacturers intervening to obstruct such tests.
One additional request: if you find the results of the test are really useful, please consider doing another DVD with the raws for people to print large with their own equipment.