Which feature is unique to Roll-Up Reporting Properties?

The Source Properties report is unique to Roll-Up Reporting Properties because it provides a consolidated view of data from all the individual source properties included in the roll-up. This report allows you to analyze performance across your entire digital ecosystem from a single interface, which is the primary benefit of a roll-up property. BigQuery Export is available for all Google Analytics 360 properties, not just roll-ups. The Users Flow report and Audience Insights report are standard reports found in both standard and 360 Google Analytics properties, providing visualizations of user navigation and demographic/interest data, respectively. They do not specifically address the aggregation of data from multiple properties in the way the Source Properties report does.