Main changes are the number of pixels of CCD (maximum recorded pixels of 2816x2112), PictBridge support, and design of front exterior. Item DiMAGE G600 / KD-510Z and DiMAGE G500 Number of recorded pixels: 2816x2112 / 2592x1944 PictBridge : Supported / Not supported Weight (excluding battery and memory card): Approx. 195g / Approx. 200g Built-in memory : None* / Available *It is impossible to copy and move the files between the memory card and built-in memory. (It is possible to copy and move the files between the SD Memory Card and Memory Stick.)