Sony RX10 camera score published at DXO Mark Lab, since both camera features same sensor hence score is almost same, but with 1.5 inch sensor and approx a year old Canon G1X is the only compact zoom camera with such a broad lowlight ISO score.
PS: Canon G1X features 1.5 inch sensor on the other hand Sony RX 100 M2 and RX10 features 1 inch sensor.
src-dxomark lab