CPU scheduling
How your cores are allocated on the hypervisor.
Storage and encryption
What happens to your data at rest.
Addressing and transit
Addresses, uplink and routing. Everything here is optional.
DDoS protection
Filtering profile applied at the edge.
Control panel
Preinstalled and licensed, or nothing at all.
Backups
Restore points and where they live.
Everything else
The switches other providers make you open a ticket for.