Really comes down to price and size. If you want the smallest camera with the best image quality, RX100 is it. No other camera will fit in your pocket with a built in flash and sensor size larger than 1/1.7" and offer the same or better performance, not the S100, S110, G12, G15, LX5 or LX7, EX2, or XZ1 or XZ2.
I want a compact, fixed lens camera to take everywhere when I'm not carrying my 5d2 or 7d. Have previously tried m43, E-P1 and E-PM1, and felt they were too slow and didn't want to buy multiple lenses for them and my dslrs. Bought an S100, it takes sharp, detailed shots but also tempted to exchange for RX100. I keep reading that the Sony has a sensor that is triple the size, and the price is double what I paid for the S100. Can anyone who has used both offer insight as to whether I should stay with the Canon or return it and get the Sony? Can the Sony offer double or triple the iq to justify the price? Thanks, Debbie