The PSP300x and PSP300xc are both versions of the Sony PSP handheld game console. The "x" and "xc" refer to different variations of the PSP300 series. To determine which model you have, check the model number on the back of the PSP or look for the presence of a microphone and camera. The PSP300xc has a built-in microphone and camera, while the PSP300x does not.