No - More like a Tommie Frazier or Eric Crouch from Nebraska. It looks like Randall El has a lot more "quick" in his game than Marshall would. I don't know if he is even worth taking a chance on - even as an undrafted FA, but I've never been a big fan of his.
I've seen each CB play a couple of times. Jackson and Rolle more than the rest. I would rate Rolle number one of my draft board. If anyone got a glimspe of the matchup with him and Larry Fitzgerald you might have a stronger opinion of him.
But I wouldnt mind Rogers or Pac Man at #20. The last two times I got to see Rogers he impressed me. Seemed to always be locked on his WR and looking for the ball.