Explanation:
User1: Read and Data Access
User2: Owner
https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#reader-and-data- access Lets you view everything but will not let you delete or create a storage account or contained resource. It will also allow read/write access to all data contained in a storage account via access to storage account keys.
https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#owner Grants full access to manage all resources, including the ability to assign roles in Azure RBAC.