i believe that mod jumps the same distance as normal jumping, No advantage.
The distance is not the issue, it's the motion he has upon jumping from higher ground. We all know that when you jump from 1-2 meter height you fall onto your knees which slows you down significantly/stops you, then you get up and continue. With this mod, such motion does not happen, instead he continues jumping normally like nothing happened.
You should know what I am talking about.
@Andeey