AWS::Serverless::Api和AWS::Serverless::HttpApi都是AWS CloudFormation模板中的资源类型，用于创建Serverless API网关和Lambda集成。它们的主要区别在于：

1. AWS::Serverless::Api支持REST和WebSocket API，而AWS::Serverless::HttpApi仅支持HTTP和WebSocket API。
2. AWS::Serverless::Api需要使用AWS::ApiGateway::Deployment资源来部署API，而AWS::Serverless::HttpApi支持自动部署。

以下是AWS::Serverless::Api和AWS::Serverless::HttpApi的代码示例：

AWS::Serverless::Api示例：

Resources:
  MyApi:
    Type: AWS::Serverless::Api
    Properties:
      StageName: prod
  MyFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: my-function/
      Handler: index.handler
      Events:
        MyApiEvent:
          Type: Api
          Properties:
            Path: /my-resource
            Method: GET
            RestApiId: !Ref MyApi

AWS::Serverless::HttpApi示例：

Resources:
  MyHttpApi:
    Type: AWS::Serverless::HttpApi
    Properties:
      Name: MyHttpApi
  MyFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: my-function/
      Handler: index.handler
      Events:
        MyHttpApiEvent:
          Type: HttpApi
          Properties:
            Path: /my-resource
            Method: GET
            ApiId: !Ref MyHttpApi