# 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 |