Whats the difference from preorders on March 5 at Staple and the preorder website opening on March 6. Also how much is it to preorder

As you may know that's since been changed to March 7 (I forgot Staple is a 2-day con now) but the only real difference is that at Staple you can meet me in person, see how horribly awkward I am, and also pay in cash. You'll also be among the very first to get the books once they're done, if you don't like waiting. More than you will already have to, I mean.