It is not clear from the original email how intertwined the country
differences are. If much of a given chapter is identical, then an inset
strategy might work. Make the text that is identical for both countries
an inset and keep the text that is different maintained locally. Then
you wouldn't have to worry about copying and pasting text back and
forth, you would just keep the inset text in a commonly accessible location.
An advantage of using "shell" chapters with insets is that the chapter
keeps the page layout (letter vs. A4 for example) and all the variables
and the inset text picks that stuff up seamlessly.
Senior Technical Writer
68 Moulton St.
Cambridge, MA 02138