Another thing I've been increasingly frustrated with on the RX100 that I'm curious how the Lumix fares is startup/shutdown times. And just overall responsiveness. I often use a P&S when I'm out running, and want to be able to quickly take it out, get the shot I want, put it back, and keep running. The Canon is just so much faster than the Sony:
Canon G5X Mark II:
Power button to photo taken (cold start) - 1.5s
Power button to photo taken (warm start) - 1.5s
Power button to lens retracted - 0.9s
Sony RX100 Mark VII:
Power button to photo taken (cold start): 5.5s
Power button to photo taken (warm start): 2.0s
Power button to lens retracted - 1.7s
Doesn't seem like a huge difference, but it's the difference of several missed shots! Especially coming from a cold start (the first time you start it after taking the SD card or battery out and back in or it's been sitting for a while), which doesn't seem to make any difference on the Canon.
The other thing I noticed during these tests is that the RX100 occasionally doesn't respond to the power button and you have to hit it again. I don't mind this too much, but sometimes it then does respond to the first power button hit and after a couple seconds the camera turns itself back off again! In those cases it's closer to 10s from when I first try and turn it on to when I can actually take a photo. I've noticed this occasionally while out using the camera but always assumed I just didn't hit it right or something. From doing a bunch of tests with the stopwatch I can confirm it's an issue even if you hit the button fully each time.