Yup! The scales might add a bit of visibility, a bit more action as it would appear in the water as opposed to a "just black" of the same model. Everyone has their own beliefs as far as what plugs work for them, what colors, sizes, action, etc. So there is a few good reasons to have such diversity in all plugs.....its what puts the fisherman in his comfort zone! Having what he/she likes at any given moment on the water. Just my .02 cents Max.
