I was thinking about Big Ears + speed-bar. I understood the speed-bar increase speed decreasing angle of attack and the Big Ears we sink faster because we decrease the lift (wing area).
Both together make sense to me, Big Ears reduce lift (wing area) but introduce more drag, decreasing speed, with the speed-bar I increase speed reducing angle of attack. When you start to go down the wind is less strong (gradient) and you go faster upwind.
Only speed-bar make sense as well, the wind increase and I want get off the ridge or I am in a sink area and I want to cross it faster.
Is there a scenario where I should use only Big Ears ? Or the "normal" is always Big Ears with speed bar ?