Looking at the rear panel view, the SR7010 seems like a dressed up X4200W and the Marantz probably has higher quality internal components. Overall it probably fills the gap between Denon's X4200W and the X6200W. D&M marketing is smart this way because for people who don't mind either brand and their looks, they can choose purely base on feature set, bench measurements and price point. It makes it a little easier to decide because there are no two exactly equivalent models between the two.