Boysen moves the power UP in the RPM range, doesn't create more total power just moves it.
The VForce makes gobs more power everywhere
This is accomplished by the dual reed setup in the VForce. A typical reed cage - Boysen, stock, etc.. - has a total usable opening of 10 - 12 mm. The dual setup of the VForce allows for a 20 - 24 mm opening on the reed cage. More air and fuel = more power.