DxOmark posted the new Sony RX100m4 sensor test results. The good news is that there is a small improvement compared to the previous generation and:
For a physically small sensor, the new 20-Mpix Exmor RS BSI CMOS chip ranks high, coming in at 116th in our database for sensors of all sizes. Performance ranks alongside recent Micro-Four-Thirds models and even APS-C-equipped DSLR models such as the Canon EOS 7D Mk II and EOS 760D.
RX cameras store links:
RX10m2 at Amazon, BHphoto, Adorama, FocusCamera, Uniquephoto.
RX100m4 at Amazon, BHphoto, Adorama, FocusCamera, Uniquephoto.
In Europe at:
RX100m4 at Amazon DE, Amazon UK, Wex UK.
RX10m2 at Amazon DE, Amazon UK, Wex UK.
In Asia at:
RX10m2 at Digitalrev, CameraPro.
RX100m4 at Digitalrev, CameraPro.