Here we are comparing two cameras with different body types: Nikon D850, which was introduced in August 2017 is a Semi-Pro DSLR camera with a 46.0MP Full frame sensor whereas Sony A7R II, which was introduced in June 2015 is a Pro Mirrorless camera with a 42.0MP Full frame sensor.
Despite some fundamental differences of these two body types, Mirrorless cameras are becoming serious alternatives to DSLR cameras thanks to their size/weight advantages and recent improvements in their focus speeds , which makes this comparison even more interesting. Fortunately, you can't go wrong with any of these cameras as we rank them amongst Top 10 cameras in their classes. Nikon D850 is ranked #1
out of 90 Semi-Pro DSLR cameras with an overall score of 94 whereas Sony A7R II is ranked #4
out of 39 Pro Mirrorless cameras with an overall score of 96.
Let's have a brief look at the main features of Nikon D850 and Sony A7R II before getting into our more detailed comparison.