What is the difference between JSON.NET DataContractJsonSerializer and the Newtonsoft JSON serializer

c# asp.net asp.net-mvc entity-framework entity-framework-5

You can find the comparison of the performance here

_{(source: newtonking.com)}

Here is the feature comparison,

http://james.newtonking.com/projects/json/help/index.html?topic=html/JsonNetVsDotNetSerializers.htm