I think that pencil jets are much better as you can direct the water accurately to where you want it!
Groundhog everyone is different and just as well or the world would be a boring place.
I can't see how you would have more control with a pencil jets though. Here is one example. To clean the edge of a frame next to the wall with a pencil jet, you would have to lift the brush off the frame, tilt it inwards to wet the frame, then brush it, and do the same again to rinse it. Now with a fan spray reaching the ends of the brush, everywhere the brush goes the water is cleaning and rinsing.
Peter