Level 122
Spatie advantage is role and permissions
A role can give many permissions. You can assign the user a role, but in your code, test for permission to do something. In your code, you don't care what role they have, only that they have the right permission.
Model Policies are something else again. These determine which models the user can interact with. For example, its not sufficient to say that someone with post edit permission can edit ALL posts, they may only be allowed to edit posts that they created. The combination of permissions and policy can be important for your application.
(or it might not be - depends what you are building)
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