Differences between discovery using a Discovery Profile and Metric Family change detection cycle.
Release : 20.2, 21.2, 22.2
Component : IM Reporting / Admin / Configuration
Change detection updates the metric families on existing devices.
Inventory discovery discovers new devices and updates the existing device attributes such as sysDescr, device type, etc.
Further documentation:
https://techdocs.broadcom.com/us/en/ca-enterprise-software/it-operations-management/performance-management/22-2/building/discovery.html
https://techdocs.broadcom.com/us/en/ca-enterprise-software/it-operations-management/performance-management/22-2/building/manage-devices/device-reconfiguration.html
https://techdocs.broadcom.com/us/en/ca-enterprise-software/it-operations-management/performance-management/22-2/building/manage-devices/device-reconfiguration.html