From college tapes.. Suh looks more explosive however IMO Raji is a better run stuffing type.
IMO, it really would depend on the defensive philosophy and how you want your downs to play.. in our case for the Packers.. I would probably edge towards Raji if we are taking nose tackle or a versatile player to slide up and down the line.
If we are strictly talking a 3-4 end.. it would be closer.. I think you may gain some pressure from Suh over Raji.. just you might give a bit in run support.
Talking strictly based on last years short comings on the Dline.. I will take Suh by a nose.. Pickett, Jenkins, Suh over Pickett, Jenkins, and Raji at DE.
"The oranges are dry; the apples are mealy; and the papayas... I don't know what's going on with the papayas!"