Waterproof to 15 m is useless for scuba diving. I don't understand which is the market for this camera.
I agree with the three posts above. The Sony would be a nice camera for me, but I like to take pictures with OVF or a superior class EVF. Just don't like the LCD screens for compose. No option for viewfinder, the RX100 is not the camera for me. Waiting for the XZ-2.