I seem to recall that the new VX-6 Leupold that Barsness tested rated an 8 just like the S&B's he's tested.
I've compared both as did the owner of the one we compared to my older M8, 6X42 Leupold. After focusing and refocusing both for almost an hour, neither of us could see a difference. Might be a tiny one to most careful testers, but we could find it.
The VX-6's have had no tracking problems either. E