Comment by bigtunacan

It's been a long time since I've used Mongo so I don't know if it only supports eventual consistency, but DynamoDB does support transactions and traditional consistency, but it comes at the cost of reduced read throughput.

DynamoDB also supports relations, but they aren't called relations because they don't resemble anything like relations in traditional relational databases.

You may already know this, but just to clarify DynamoDB isn't really a document oriented database. It's both a key/value database and a columnar database, so in that sense I'd closer to Redis and Cassandra than Mongo, but there's definitely a lot of misinformation on this front.