| Azure Service Manager (ASM) | Azure Resource Manager (ARM) |
|---|---|
| Provides cloud services majorly for IaaS workload and specific PaaS workloads | A new portal that provides services for all IaaS and PaaS workloads |
| XML driven REST API | JSON driven REST API |
| Removal of a resource is slightly tedious | Resource removal is simple and easy by using Resource Groups |
| Deployment is done using PowerShell script | Deployment is done using ARM templates |
| Many features are not available in ASM | Many features like resource tagging, resource movement within the same region, role-based access control feature etc. are available |