@DougS21, I would recommend taking the bigger list of the two and making a copy of it. You can create a new list, select all the contacts on the original list, and copy them to that new list. Once copied, you can go to the second list you want to compare. Select all the contacts on this second list and remove them from the copied list you make. If you compare the contact totals on the copied list before and after your remove the other list, you can see how many contacts are on both lists.
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