Knowing the different levels of reports will help you understand how best to compare them. It's best to only compare reports that are in the same level/group. A report is classified as one of the following levels:
- Conversations* (see note below)
- Contact* (see note below)
- Data Export
The help guide for each report will contain the Report Level of the report in the Note section.
See Comparing Reports to understand how to compare reports on the same reporting level.