Based on your example of corporate, the way that you have build the security classes you will not see any difference on security with any of the options (parent - entity).
On the other hand, if you have the following example:
Corporate security class Corporate
Uruguay security class Uruguay
Uruguay Mgmt security class Uruguay Mgmt
- If you select Node, the user who has access to Corporate will also have the same access to Uruguay and Uruguay Mgmt by default (you just set the Corporate).
- If you select Entity, the user who has access to Corporate will not have the same access to Uruguay and Uruguay Mgmt by default and you will have to set it.
(Remember to close the discussion)