Is it possible to compare two different Select Expert results to find how many fields match and don't match?

For example: I run a Select Expert query that returns 500 records with the field "Name" (List A). I then change the Select Expert values to generate a new list 450 records (List B).

(I'm assuming the number of tables and fields within the search are irrelevant, as long as I use the proper search parameters to get the desired results between the tables)

Is it possible to run a 3rd Select Expert query that compares List A with 500 records to list B with 450 records and creates a new list of the 50 Names who are on List A but not B (and again for any who appear on B but not A)?

 I am unable to save data to the database, so I can only use Crystal Reports to create and store the data from the lists to be reused again within Crystal Reports. Therefore would I need to use more than one report to create the lists and then join them in a 3rd report?

Thanks for your helps!