It is important to distinguish the Extension Pack from Guest Additions, as they serve different purposes:
: Includes support for NVMe (Non-Volatile Memory Express) storage interfaces and Intel PXE boot ROM , which allows virtual machines to boot over a network for automated OS deployments. Difference Between Extension Pack and Guest Additions virtualbox 61 extension pack better
Integrating the Extension Pack significantly improves the capabilities of your virtual environment: It is important to distinguish the Extension Pack