# Decision matrix and when to choose each
<a name="decision-matrix"></a>


| Requirement | Lambda Architecture | ECS Architecture | 
| --- | --- | --- | 
|   **Image size**   |  ≤ 6 MB  |  ≤ 100 MB  | 
|   **Cost optimization**   |  Yes - Lowest cost  |  Higher cost  | 
|   **Transformation policies**   |  No  |  Yes  | 
|   **Non-S3 origins**   |  No  |  Yes  | 
|   **Administrative UI**   |  No  |  Yes  | 
|   **Auto-scaling**   |  Yes - Built-in  |  Yes - Configurable  |