Canon EOS 6D Mark II Digital SLR Camera Body

Not counting: better AF, larger sensor (more density with even same [noise] quality is a better quality afer all), better noise control at high iso's, better picture processing, color range, continuous shooting... 6Dm2 and 6D dynamic ranges are comparable, it's hard to find differences when working with RAWs, and I processed hungreds of photos very precisely. "Terrible DR" is a histeric act. This is not worse camera than its predecessor . it's worse camera that was expected. Still it's better camera, though. Many of "worse in every aspect" myths are just ... well... myths... I Tested both cameras, and my judgement is: 6Dm2 is significally better than 6D. Yes, the sensor should be better after all these years of developement. Pity. No, buying 6D is not a better option, as the changes are more than cosmetic. IMHO, of course.

Also much of the reason I have not upgraded.

The consensus seems to be the 6DII is actually worse than the 6D. The original 6D was significantly better than it's supposed big brother the 5D3. This time, Canon was not taking chances and deliberately crippled the 6D2 to make sure it does not cannibalize 5D4 sales. Considering you can get a brand-new 6D for under $1000, it's a much better choice.