Understanding the differences between SAM and CloudFormation

First of all, a SAM template is designed to be used with serverless applications and services. At the time of writing, the SAM template reference supports the following resource types:

• AWS::Serverless::API: Creates an API gateway and related resources
• AWS::Serverless::Application: Creates a serverless application
• AWS::Serverless::Function: Creates a Lambda function and related resources
• AWS::Serverless::HttpApi: Creates an HTTP API gateway and related resources
• AWS::Serverless::LayerVersion: Creates a Lambda layer
• AWS::Serverless::SimpleTable: Creates a simplified DynamoDB table (only a primary key without a sort key)

It is still possible to combine CloudFormation's resources with SAM's resources. For example, if we want to create an S3 bucket with SimpleTable, we can do so by adding the CloudFormation resource, as in the following code:

Transform: AWS::Serverless-2016-10-31...