The information provided below is for reference only. It has been superceded by the Proxmark 3 RDV 4 and the Proxmark EVO.
The Proxmark 3 Easy was designed and produced by Elechouse, the creators of the Proxmark 3 RDV 2. It was designed as a lower-cost version of the Proxmark 3 RDV 2. It was created to be a cheaper, less capable fork of the RDV 2.
Its lower price point came at the cost of performance:
These hardware changes resulted in the Proxmark 3 Easy being incapable of performing several of the Proxmark's advanced features, including the Mifare Hard-Nested attacks.
Despite these differences, several Western distibutors sold the Proxmark 3 Easy as a 1:1 alternative to the RDV 2; a source of frustration for the developers and the misled customers.