Who is the more superior and advanced sentinel robot: nimrod or bastion?

Since Bastion is really Nimrod and Master Mold merged together I would have to say that Bastion is superior and would win in a fight against essentially an outdated version of himself. He has the combined knowledge/abilities of Nimrod and Master Mold plus his profile on Marvel.com says that the Siege Perilous appears to have made him immortal.