This roo looks more like maybe he's from a White leghorn ( or some breed with Dominant white) crossed on a RIR) He has dominant white covering where the black would normally be in a RIR, He is a BEAUTIFUL bird though.
But with the rooster in question, Since Delawares don't have dominant white, the black, columbian pattern can still come through in the Sexlink males and red from a RIR roo appears to be leaking through as well so I would say that you have a Sexlink male from a cross of a Red Roo on a Delaware or Columbian colored hen.