I would do this by selecting the text in both docs and Convert to Table. Then I would add a second (empty) column to each. Then copy the data column from one file to the empty column of the other file.

This will give you a two column table with the contents from both files side by side. If you are lucky enough that the paragraph counts in both files match then you won't need to fiddle with alignment.

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Andrew Lockton
Chrysalis Design, Melbourne Australia