Switch to Mac OS X From Microsoft Windows
This is a quite interesting comparison of OSX and Windows GUIs, written for prospective developers. obviously biased as it get,s but it is quite interesting, with side by side comparisons of Ui elements and critique on why things work better.
Typical extract:
“…clear dialogs in Mac OS X communicate to the user: 1) what happened, 2) why it happened, and 3) what to do about it. To ensure that consistent format, Mac OS X dialogs tend to use verbs as button titles…”
So now you know!