List some distinction between Amazon DynamoDB and Amazon SimpleDB?

Amazon DynamoDB: It is a quick and versatile NoSQL Database Service that is intended for web-scale applications, to keep up typically elite and to be profoundly savvy for remaining tasks at hand of any scale, on the highest point of all it is enthusiastically suggested.

Amazon SimpleDB: It has scaling confinements and is a solid match for littler outstanding tasks at hand that requires question flexibility. It naturally lists all thing qualities and supports inquiry adaptability at the expense of execution and scale.