LED Matrix vs LED Matrix with backplate?

Hi all, I want to get a RGB LED Matrix to play with and i saw this 2 on sparkfun website. http://www.sparkfun.com/commerce/product_info.php?products_id=683 http://www.sparkfun.com/commerce/product_info.php?products_id=760

Can i know what are the main difference between them, and what do you guys recommend?

Thanks :)

The first one is just the LED-matrix, and the second one is an LED-matrix with a serial interface, witch means you won't need any other driver chips, just hook it up to the Arduino and pass serial data to it :]

So the first and cheep one is more of a DIY project, you'll have to find some driver chips and wire it all up yourself; whereas the second one is more of a “out of the box 'n running”, you wont need to solder anything, just snap in some jumper wires.

So it depends on how much you want to do yourself, if you're new to electronics i might recommend you the matrix with serial-interface; but if you would like to do it all yourself I'd buy the one without. - personally I would take the one without serial interface, just for the challenge ^^