Photo wise, both is able to produce nice and sharp photo.

I got experience on rx100mk2
If you plan to use it to record video as well, I can tell rx100mk2 can produce very smooth focusing.
But I am not sure about the G7x mk2 of the video, you can just go to the shop to test it out.

The way I test of the video is, two object one is front and one is far back, point the camera to the front object, see how fast it can focus
Then point it to the back object, check how smooth of the camera can change focus from the front object to back object and the speed also.
Then point back to the front object
The result must not jerking and hard to focus

If you do not do video, just pick one that you feel good will do.