I also recorded the capture sounds on my little Casio with both about a foot above the cam. Sounds were surprisingly similar but K-7 screw focus whines before the shutter while the G1 has a very soft whir that probably didn't reach the microphone.
Clearly the K-7 lives up to the 'enthusiast' label with higher-res screen, the top LCD panel and the weather sealing. Those will be hard to top, but the flip screen on the G1 is a point in its favor. The investment was small, so let the games begin!