Apple Business Essentials vs Apple School Manager

What is the difference between the Apple Business Essentials and Apple School Manager?

I use Apple School Manager for our fleet of student iPads with Securly MDM. We also have 200 staff Macbooks, as well as iPhones and iPads, that I would like to remotely onboard and manage.

Can I use Apple School Manager for my staff MacBooks?

Or do I need Apple Business Essentials?