Has anyone tried to do a diff between 1.0.1 and 1.0.2 to see which files have changed and how?

I got to wondering because of the thread asking what will happen to mods when 1.0.3 comes out. It would be good to know whether things are updated surgically or in large chunks. For example, if they update any part of the calendar application, will they simply overwrite the entire com.palm.app.calendar directory?