I have been using the 80D for a while , and I’m so in love with the dual pixel CMOS AF, plys the excellent canon touch screen it’s a beast. I pre orderd the 6D mark II from BHphoto , I know it doesnt have 4K but usually use canon for medium or close up shot 1080p works pretty well for landscape, long and wide shot, use I use the G7 with 4K on the glimbal and sync the color in post. Please ask yourself beforethepurchase doyou shoot 120FPS that often I don’t . do you often need to track your subjects while they are moving, I do because I shoot wedding, and thiss is extremely important to me . manually maintain moving subjects with different speed in focus just a daunting task.
6D mark 2 low light is not bad, but it looks like it has some de-noiser effect. when using high iso and for fynamic range its little brother 80D wins.
In body stabilisation with one bar is not bad, two bars image quality is very bad 6D mark 2 does not have. Mov format 80D does. I still wish its as 4K, but the dual pixel CMOS AF plus the cannon touch screen is more important atleast to me.