They are identical aren't they?

no

There's a flick downwards on the right edge of the first stroke.

Maybe not apparent in computer fonts, but obvious in handwriting fonts and explained in the book (you do have the book right?)

Mending is just a variant of 正

Zoo is derived from a picture of a foot and has a hook.

Yeah zoo has a flick on the right side, thanks for clearing that up.

I *really* recommend installed the stroke order font if you haven't done so already:

http://rtkwiki.koohii.com/wiki/Kanji_str...r_on_hover

many PC fonts differ hugely from the (correct) written counterparts - sometimes it's not obvious. This font shows exactly how they should be handwritten, and in what order - very useful for building good habits!