Although all of these types of structured data are acceptable to use, Mueller has gone on record saying Google prefers the use of JSON-LD.

Support for JSON data types and JSONPath query will allow the Aerospike database to function more like the document stores that Web and mobile developers are selecting for new systems of engagement, ...

Overview:  Not all databases are the same. Consider scalability, speed, and data type support before deciding.High-end ...

It has added the ability to deal with complex JSON data types -- providing full insert (write), update, and delete capabilities.