Can SharePoint compare two document versions?
“In Word 2003, you can compare documents side by side. Open two documents. Then, from the Window menu of one of them, select the Compare Side By Side command. If you have only two documents open, the command will automatically choose to compare them. If you have three or more documents open, you’ll have to select which document to compare with the current file. A floating toolbar with two buttons will open. If the button on the left is selected, Word will scroll both documents at the same time.