There are a lot of differences, make sure that you know your local admin accounts password before making the switch.
Once the connection is made, Jamf and Entra will assume any LOCAL Jamf group with the EXACT same name as an Entra AD group should be mapped. You will set all the access in the Jamf Local group, but you won't be able to see who has access. Also, users can only be granted access through a group or a local Jamf account as LDAP accounts won't work. Other things like policy limitations will work a bit differently. So long as you know your local Jamf admin password, there are no worries of breaking anything beyond repair with the transition.
