DxO tests the RX100m5. And as expected it has same RX100m4 performance.

DxOmark posted their RX100m5 sensor test results:

The upgrades to Sony’s RX100 V autofocus and burst shooting frame rate are welcome improvements for photographers after a high-performance compact. Its incredible 24fps frame rate with full autofocus and exposure tracking, not to mention its ability to capture up to 150 RAW and JPEG files, is some impressive high-speed shooting, and the new 315-point autofocus should improve focus tracking, too. Image quality hasn’t improved over the Mark IV, but it’s still very good for a compact camera. If you can shoot outdoors or in good lighting conditions at low ISO sensitivities, both color and dynamic range are excellent, and noise is respectable up to ISO 800. If high-quality low-light photography is important, however, the higher levels of noise above ISO 800 might be disappointing and may require some smoothing in post-production for better results.

No surprise here…