Here are a few more comparison shots, this time in a dimly lit room with the Sony and the Panasonic TS2 weatherproof P/S that was my prior "can't use the K5) camera. The Sony is not waterproof but it's very useful in a dark room, better than any point and shoot I've used to date.
All shots are zoomed to 100% and cropped with no editing. The TS2 is a 14 Megapixel small sensor vs the RX100 20.2 larger sensor.
TS2 "High Iso" Camera takes a 2mb high iso shot, results are not really usable for much.
RX100 Iso 3200, very usable.
TS2 Auto
RX100 Auto
RX100 "Twilight" mode. This takes a quick blip of shots and joins them together, it is VERY effective on still objects. This camera can take up to 10fps bursts of shots for a few seconds.