I'm using MSExcel2003, SP2....

I already read about the technique where you can put two MSExcel
spreadsheets side-by-side and *visually* compare...which is a very "manual"
technique, but...

Will MSExcel "compare" two worksheets and highlight differences for the user
(like you can do in MSWord...where the resulting output highlights
differences in red...great to for comparing differences in different
versions of some text document)?

If not, is there a software app (preferably in WinXP) that would at least
give a "yes" or "no" on whether two files are identical (duplicates?)

Thanks,
George