V/linear pull/low MA, are names for same Idea .. a low leverage lever pulls more cable.

raise the MA & the effort to move the work , your cable pull, is reduced

because the fulcrum/pivot is closer to that work..

Non V Road aero levers have the higher MA, cable out the top road levers a bit less, V type , much less.


http://en.wikipedia.org/wiki/Lever http://en.wikipedia.org/wiki/Mechanical_advantage