BW Queries into OData Service : Difference in Using "Controller for MDX" Vs "Controller for Easy Query"

Hi ,

We are following below blog link to develop OData service for BW Queries

Transform SAP BW Queries into OData Service: Part 1 - Generation and Activation

Please can u let me know while Redefing --> BW service , What difference it makes in selecting Access type as "Controller for MDX (SAP BW)" or "Controller for Easy query (SAP BW)" ..?

Thanks & Regards,

Anup Singh