Panasonic ZS60 has a 18.0MP 1/2.3" (6.17 x 4.55 mm ) sized CMOS sensor and features Venus Engine processor. On the other hand, Canon G9 X II has a 20.0MP 1″ (13.2 x 8.8 mm ) sized BSI-CMOS sensor and features DIGIC 7 processor.
Below you can see the ZS60 and G9 X II sensor size comparison.
As seen above, Canon G9 X II has a 4.1x Larger sensor area than Panasonic ZS60. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.