"Fits in a jeans pocket" is an important priority in some some situations, which is why I got the S95 then the S100. The EOS M has better IQ (especially in low light or when a fast shutter is needed), but it's bigger and sometimes the 18-55 isn't wide enough, whereas 24mm FFeq would be (that happened today).
You should try the ef-m 11-22 - you can get it here in Canada through Canon for $399. It is a fantastic lens - I used it %70 of the time on a recent NYC vacation trip.
My S90 is a little long in the tooth and has not seen the light of day since I got the M but this little G7 X seems interesting. The latest RX III seemed a tad short on the long end though at 70mm.
Correct me if I am wrong, don't the G series all have hot shoes whereas this one does not?