The Canon G1X Mark II latest test result published over the web, the score of new G1X Mk II is lower than its predecessor Canon G1X.
Canon G1X Mk II comes with new sensor, fast / bright lens and improves AF performance, but the new sensor test score turn out too bad according to DxO Mark lab… hope Canon will fix this in next Canon G1X Mark III camera.
Also see specification comparison review here – Canon G1X Mark II vs Canon G1X | | Canon G1X Mark II vs Sony RX100 M2
Probably it’s due to on-sensor PDAF. But compared to previous G1X, this doesn’t really matter because the lens is faster.