A wins since Tobirama can't dodge him without a mobile marking especially when he is slower than base Minato. He displayed an impressive reaction feat when he marked jubito but on the otherside lets not forget not only he died to accomplish what he did, but his opponent was brain dead only acting with instinct like a perfect reflection of an animal.
So jubito may have had the fastest body but randomly running without thinking, observing the opponent, analysing things and so on, he could not use his speed at full potential with the situation making him an easy target for the side opponent.
With the durability and strength of the body however, he was still almost impossible to kill and difficult to counter. Despite all this, the brainless body was so fast for Tobirama that he had no other options than resorting to a mutual contact in order to tag him something that coated his life. With a living body, he can't allow himself to proceed this way