The JsonProperty class returned by DefaultContractResolver.CreateProperty has two properties about converter, Converter and Memb
I've opened an issue about the docs on this here github.com/JamesNK/Newtonsoft.Json/issues/363.
But one obvious difference between them (obvious from the source code, that is) is that Converter is only used when serializing and MemberConverter only when deserializing. I don't know if that's the full story though, and the naming does not say much.