The speed release has a steeper ramp, giving you less feather time (bad in the snow) and quick engagement (good on the track). It only provides one pickup point, which sets the pedal height (the point off the floor that the clutch engages) very low (close to the floor). This is great in a track car, but in a daily driver it can make stop and go driving a bit tedious, and doesn't let you play with the clutch as much which is great in wetter driving conditions, etc. The triple pickup quadrant gives you the option of setting your pedal height where you want it, including the spot the speed release picks up- it just won't engage quite as fast because of the ramp arc- which is better on a street car.