Wasn't sure if I should make a whole thread, but when looking at the Compare page for the 2DS, it stated that the 2DS and N2DS XL both come with an AC adapter, which the N3DS (small and XL) do not come with. Also, people have already pointed out that the N2DSXL and N3DSXL have the same screen sizes.
Also, since the system can be closed there's no need for a sleep switch, and the N2DSXL is a bit shorter than the N3DSXL, though it's just as wide and thick.
Also, since the system can be closed there's no need for a sleep switch, and the N2DSXL is a bit shorter than the N3DSXL, though it's just as wide and thick.