Whuch Cody you want depends on what role you are filling. Dan is an edge rusher. Shaun is an interior rusher. Shaun is better suited in a 3-4 defense as a DE/DT tweener. Dan seems more like a 4-3 talent.
So I don't really see the two as draft competition for each other. Which one you take depends on which defense you are running and what needs you have on the d-line.