I'm biased, but from my point of view:
Workspace ONE can do everything that Intune and SCCM together can do. Neither SCCM or Intune by themselves compare to Workspace ONE, that is why Microsoft still sells both.
Workspace ONE can leverage WORKGROUP, ADDS Domain Joined, Hyrid Domain Joined or AzureAD/EntraID joined devices
Workspace ONE also supports other Directories
Workspace ONE provides the ability to deploy EXE, MSI, MSIX and applications within a ZIP without conversion, and leverages CDN and Peer Distribution (BranchCache) out of the box
Workspace ONE also provides a Workflow capability called Freestyle Orchestrator that can check conditions, deploy apps, scripts and profiles
Workspace ONE can leverage in many inbuilt profiles, including best in class (IMHO) Bitlocker management, Microsoft CSP and Custom Profiles that can write registry keys, run powershell commands or send Custom SyncML to the OMADM client on a device
Workspace ONE also has Smart Groups that allow for dynamic grouping of devices or collections
Workspace ONE has great DEX capabilities
Workspace ONE has great visualization and reporting interface
Workspace ONE is best in class for all platforms (iOS, Android, Chromebook, Windows Desktop and macOS) and more to come
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