The box which will be housing the 4GB Kinect bundle in Australia has apparently revealed a 250GB Hard Drive Kinect bundle as well. The only percievable difference between the two, as of now, is that the XBox 360 S console in the 4GB bundle will have matte finish, while the one in the 250GB bundle will have a glossy one. Also, the 250GB bundle will come with an Xbox 360 Headset.
Both of them will have the Kinect sensor, and the 4GB version is confirmed to come bundled with Kinect Adventures. It is also written that the in the 250GB version, the “Hard Drive includes game and demos.”
Thanks for the images, Joystiq!