Here we are comparing two Sony cameras cameras with different body types: Sony RX1R II, which was introduced in October 2015 is a Large Sensor Compact camera with a 42.0MP Full frame sensor whereas Sony A7R III, which was introduced in October 2017 is a Pro Mirrorless camera with a 42.0MP Full frame sensor.
Comparing an interchangeble lens camera to a fixed lens camera is a bit tricky but we will do our best to make this a fair comparison. Fortunately, you can't go wrong with any of these cameras as we rank them amongst Top 10 cameras in their classes. Sony RX1R II is ranked #1
out of 57 Large Sensor Compact cameras with an overall score of 83 whereas Sony A7R III is ranked #4
out of 38 Pro Mirrorless cameras with an overall score of 96.
Let's have a brief look at the main features of Sony RX1R II and Sony A7R III before getting into our more detailed comparison.