I have been looking at upgrading my Panasonic LX7. I set the standard as 24mm as the base wide angle setting with some zoom – don't want a fixed length lens – but I don't really need anything beyond 70-80mm, 1" or larger sensor, fit into a small shoulder strap pocket. Once you start being more specific you start to get into feature wars with one person's personal preferences competing with another's. I have rounded weights etc so one concentrates on real differences not 5 grams. It really seems to break down into three groups depending on whether size etc. I am sure there are others that could be added to the list (Nikon 1?)
My short list is:
LX7 – 300g, 24-90, small sensor, retain if nothing clearly better
1" sensor, fixed lens, easily pocketable
Sony RX100 III – 300g, 24-70
Canon G7X – 300g, 24-100
Larger sensor, fixed lens
Pana LX100 – 400g, 24-90, 4/3 sensor, biggish, heavier, need large pocket
Larger sensors, swappable lenses
Sony A5100, 280g + lens – unsure how pocketable with a small zoom
Pana M5 210g + lens 70g for 24-64 zoom – the lightest option?
For my specific needs I am tending toward the RXIII or G7X because of weight and pocketability.