| DataContractSerializer is used by WCF to determine which fields are serialized into XML. | XMLSerializer is used by Web services that do not determine which fields are serialized into XML. |
| HTTP, TCP, and MSMQ are other protocols supported by WCF that can be extended to provide a comprehensive solution, ENSURE transactions, and provide a reliable experience. | HTTP and HTTPS during communication is the only protocol supported by Web services. |
| MTOM, XML, and BINARY message encoding are supported. | XML and MTOM (Message Transmission Optimization Mechanism) message encoding is supported. |
| Hosting options include IIS, Windows activation services, self-hosting, and Windows services. | Hosting is only possible in IIS. |
| Compared to Web Services, WCF is faster and more reliable. | WCF is faster and more reliable than Web Services. |
| WCF services are defined by the ServiceContract and OperationContract attributes. | Web services are defined by WEBSERVICE and WebMethod attributes. |
| RESTFUL SERVICE is supported, but with limitations. | It is perfect for building RESTFUL services. |
