With all due respect, I'm not seeing any reason why your picture couldn't have been taken with a Q, and you didn't provide a comparison picture, so, you're being a pinhead and asking me to take your word for it, rather than showing me side by side images so I can make up my own mind.
One camera is bigger than the other. 50% heavier.
RX 100
114.8 x 66.2 x 55.0 mm/(4.52 x 2.61 x 2.17 inch)
393 g with Battery and SD Memory Card (0.86 lb)
Pentax Q
3.9 x 2.3 x 1.2 in. (98 x 58 x 31 mm)
8.5 oz (241 g) includes batteries, kit lens
My Pentax W90 12.1 MP
5.7 oz (161 g) includes batteries
4.2 x 2.3 x 1.0 in.(107 x 59 x 25 mm)
I'm not sure why I'd carry either of them when I can carry my Optio W90 in a pants pocket, and it's waterproof and shock proof. What you're saying is the heaviest camera with the biggest sensor is the best one? duh....
Why else would you even take on that extra weight. As in most of these discussion, you've dismissed the factor that doesn't favour the camera you champion as unimportant. You don't get to do that. The only reason anyone ever buys this type of camera is for the weight, not the IQ. If the IQ was important they'd buy something bigger.
SO the Q weighs 50% less. Weight is the biggest reason people buy these camera, end of discussion. The Q is for people who don't want to carry that extra, 150 grams.
If you're concerned about IQ, and want a small package how about a K-S2. Neither the RX 100 nor the K-S2 fits in your pocket of so size doesn't matter. It only weighs twice as much, and you get a bigger sensor with much better IQ? We can play this game forever.