the DSI is just like the DS lite but it has addd features like camera, music studio, sound studio, picture albums, arr internet and on the internet you can download games onto it. Now the DSI XL is diferent it has the same features but more added i think abd its got a bigger DSI stylus plus bigger screen, they only colours they come in are bronze and some werid colour looks like shiny matalic purple but a werid name oh and the DSI XL is $300 and the DSI is still worth $200 and im gonna trade in some games