Hi John,
sorry if I answer only now, but lately I wasn't at home...
After having seen your comparison and read your comment about focus, well... I don't think the M8 is my cup of tee.
I would have bought it for is size (especially lenses size) but I really prefer a SLR (I shortly had a rangefinder before), if the M8 files are of a lesser quality too...
Plus, as you say, the Zeiss ZE lenses are a nice bonus to Canon (even if the Diglloyd Zeiss ZF review left me a bit cold... some characteristics of them seem to indicate a "quality to a price point strategy" and that price point is lower than Contax or Leica R).
Maybe this new Kodak with a shorter than normal IF filter will permit Leica to give us a FF M8... this will change the situation

And in this Leica M thread, here my little contribution, with my only M thing remaining.
Your Summicron 50's Granpa: a rare black-painted circa 1959 Summi 50mm.
It's incredible how smooth is the focus ring, how precise the aperture ring and aperture iris itself are after almost 50 years...