I have owned PowerShots S50, G5, G9, G1X, G15 and presently the G7XIII.
The G1X with its larger sensor made an impression on me. I could confidently bump up the ISO to 400, or even 800, without worries, while the other PowerShots I left at their lowest native ISO setting unless forced to go up.
The larger sensor on the G1X, however, required a larger lens which resulted in several compromises. It could no longer retract fully into the body, and required a removable lens cap. It was slow on the long end. Its bokeh was a little ‘busy.’ MFD was ‘not close’ even in ‘macro’ mode.
I really liked the flip rear LCD, as I do on the G7XIII.
I have posted this previously elsewhere - attached is a PDF thumbnail ‘contact’ sheet of my G1X teardown photos.