| Attachment | Up to 1 EC2 Instance in general in the same AZ | Multiple EC2 Instances simultaneously in different AZs | Physically attached to the EC2 instance |
| Availability Zones | Single AZ | multi-AZ | Same as EC2 instance |
| Data Migration | Requires a snapshot to be taken and restored. Backupt uses IO, so it shouldn’t be executed when there is workload | Not applicable as it can be attached to different AZs | - |
| EC2 Instance Termination | Root Volumes are terminated by default | Not impacted | Terminated with the instance |
| OS Compatibility | Linux and Windows | Only Linux | Linux and Windows |
| Cost | Lower | Higher | EC2 Cost |
| Lambda integration | No | Yes | Lambda has up to 10MB of ephemeral storage |