What is a key difference between Reporting and Performance Analytics?
ServiceNow® Reporting enables you to create and distribute reports that show the current state of instance data, such as the number of open incidents of each priority.
https://www.servicenow.com/docs/bundle/xanadu-now-intelligence/page/use/reporting/reference/reporting-landing-page.html
Performance Analytics improves performance and accelerates continual service improvement by:
https://www.servicenow.com/docs/bundle/washingtondc-now-intelligence/page/use/performance-analytics/concept/c_GetStartedwithPA.html