You can export a report comparing usage data and social performance of up to fifteen different outlets.
In order to do that, follow the exact same process as you'd export a report for an individual customer.
Click on "Reporting"
Select "Specific Customers"
In the "Specific customers" search field you may add up to fifteen outlets:
Select the topics you are interested in, set the time range as usual and press the "Export report" button.
Allow the system for some time to generate your report.
And voila! Your comparison report is ready.