DxOmark published the Panasonic S1R sensor test results. It has the exact same score as the Sony A7rIII and Nikon Z7. DxO writes:
With its combination of high pixel count, low noise, and exceptional color sensitivity, the Lumix DC-S1R is likely to appeal to the most demanding studio photographers. And when conditions require it, its excellent dynamic range means the S1R should be a viable candidate for interior, wedding, and landscape photographers. Finally, its competitive price will also strongly appeal to keen amateurs who are looking for a solid all-rounder.