Pressure washing and soft washing are utilized for different reasons and on different surfaces.
Pressure washing uses a high-pressure spray to adequately clean more durable, tough surfaces, such as concrete. It relies solely on the spray to clean your surface. Soft washing, on the other hand, is reserved for more delicate and vulnerable surfaces. Soft washing trades in the high-pressure spray for chemicals instead. The softer spray will not cause any damage to weaker surfaces.