One of the main detail is the length of this carbon parts.
According to this lenght, power and torque will increase or not ...
Longer : Torque improvement but direct prejudice to power !!
Shorter : Opposite !!!
Along 1993 season, Roche's mechanic created an electro-mechanical system which was able to modifiy the global length of both cornets, according to the throttle position !!!
Have a look on the length difference !!!