Per usual, sounds like you've done your homework. For me, at least back when I could swing the club with reasonable mph, if I had two drivers that were marginally close (for me - within say a 6-7 yard window regarding distance) - the overriding factor was always which one was more accurate toward my target on off-center hits.
But then we could get into comparative shaft specs, tolerances, etc. I was never athletic enough to get that anal about it. But some players are, and I can respect that, especially for those who are capable of delivering some serious club head speed. The more speed one has, obviously the more important those variables become.