XNA Windows and 360 differences?

I can't find a good post or article anywhere talking about the differences between the XNA language when working with a 360 versus with Windows. I am starting XNA I have done a few basic 2d tutorials and have a good understanding of the basics. But almost all tutorials out there use windows game format. I just want to know if you guys have any sources that talk about the major differences between XNA when using windows pc vs using an xbox.