I'd like to be able to compare the contents of two spreadsheets to ensure
they're exactly the same. Ideally I'd be able to compare the formulas
themselves, but just checking the data in each cell would be sufficient for
now. (I.e., would like to see a difference between cells containing 5*6 and
10*3, even though data in each cell will just show 30).

I see one post on this board (from 2007) regarding an add-in called XL
Companion, but the link isn't active and I can't find it online with a quick
search. There are other add-ins available, such as Compare Spreadsheets.

Anyone have experience with Compare Spreadsheets or other add-ins that can
do this? Or any other suggestions? I'm wary of buying software online just
based on a company website...

Thanks,
Jen