Compare values in couple of fields

Hello, I would like to find differance between values in couple of fieldes for two months. I figure out how to do that just for one filed |set diff [search index = test_im REPORT_PERIOD="2015-10-01 00:00:00"| stats count by Client Type Type2| fields - count] [search index = test_im REPORT_PERIOD="2015-09-01 00:00:00"| stats count by Client Type Type2 | fields - count] However for couple if not working properly. It would be nice to the result like (unique difference values) Client Type Type2 <difference unique values> <difference unique values> <difference unique values> Thank you