Three things that make the shooting plane (at least the Veritas) nicer than the jack I was previously using:
1) Skewed blade makes the cut with less effort.
2) The adjustable handle turns to 45 deg and other positions to allow you to provide the appropriate amount of pressure both down and laterally with minimal effort.
3) The mass powers through the cut.
These make t he plane less fatiguing to use.
4) The Veritas - like most of its other low angle offerings, has lateral set screws. These make removing and resetting the blade, square, easy. You can basically stop mid-shoot, sharpen, and come back without having to dial in again.
I have not yet felt that the Veritas shooting plane is a sacrifice in any of its features.