The Asus Transformer Pad TF103 is believed to be a cheaper variant of the TF303 due to the model number. The devices carry a 10.1 inch screen and come with a QWERTY keyboard dock that converts the tablet into a laptop computer. The QWERTY on both models can be detached with a single hand and the speakers have been moved to the front of the tablet portion of the device. In addition, the QWERTY has been updated to make it more comfortable to use.
Both the TF103 and TF303 look the same, and you can take a gander at the leaked models below.
Images of the rumored Asus TF103 and TF 303 Transformer Pads
Thanks for the tip, Guido.
source: NotebookItalia (translated)