What a Visual Studio Enterprise Subscription user can do in Azure DevOps?

They have similar access to “Basic” users and here is the list of things they can do with respect to Azure DevOps

• Add,Create and Delete workitems
• Add,Edit,Delete files and do commits to repositories
• Can Create and Merge Pull requests
• Create and execute TestCases
• Create,Edit and Delete TestPlans
• Create,Edit and Delete Test Suites
• Setup build agents
• Create, Edit and Delete Builds
• Create,Edit and delete Releases

A user with a Visual Studio Enterprise subscription is the top most in the heirarchy in the list of users