I'm assuming round head jigs vs shaped jigheads like gitzit or swimbaits. You are basically looking at the aerodynamics of the shape, a round front such as the round ball jigheads create a great deal of drag due to poor ability to cut through the water meaning more line out to reach the desired depth. I prefer this style of jig for casting and slow pushing.
The shaped jigheads i usually see are pointed on the front which allows it ct through the water better. I prefer these for trolling or drifting.
If you are comfortable with using one jig type your tool then i wouldn't change a thing, but i always say try everything once and decide for yourself.