Intro

The Nikon Z6 II and Z7 II are the first time the company has used ‘Mark II’ branding for its digital cameras, and it makes sense: these are relatively subtle refreshes of already established cameras.

However, while the overall specs of the cameras don’t change dramatically, the updates and improvements address a number of key criticisms of the original models and will start to add up for some users. Both the Z6 and Z7 have benefited from fairly substantial firmware updates since their release, but the biggest changes in the Z6/7 II come courtesy of different hardware.
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Continue here:
https://www.dpreview.com/articles/9059232586/nikon-z6-ii-what-you-need-to-know