Compare Spreadsheets for Excel 1.1.5 is a practical utility that lets you automatically compare two Excel files (XLS extension), indicating what the differences are. Thus you don´t have to do it manually, saving time and effort, especially if these files are large.
It is especially useful for those XLS files that appear identical but may have some differences (which the program will then detect), and it works with the 2000, 2002, 2003 and 2007 versions of Excel.
To work correctly it needs NET Framework 2.0 or later previously installed. If you don´t have it you can get it here:
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Link.