^^^ The Tail Pivots and Deflection are different types of turns. I agree with your description about that way Takao uses the tail to further re direct his skis. Either though most coaches say to get off the tails, once you have great command of your fore/aft balance, sometimes getting on that tail gives you that extra speed to get through a certain section of the bump formation.
What is in common is both need that fore/aft balance, Soucy with the deflection turns is on his back seat as he lands near the face of the upcoming bump. Along with knees and hip, this gives him more range to close his ankles to further absorb the impact.