@Sophie :the brushes removed a few smudges that the spray left, and since my car doesn't have an external antenna, I kinda like the brushes.
But my wife likes her antenna topper, so she prefers the spray, and I can understand a picky car guy not wanting brushes touching the paint...
I think the spray side has an actual underbody spray while the brush side is side-only
Both washes result in a few drops of hard Peoria water dripping back onto the car, but I won't argue right now