The main difference is that power washing uses highly pressurized steam to do the cleaning while pressure washing just uses unheated tap water, without the help of a heating element.

The main difference between pressure washing and soft washing is the pressures involved. Pressure washing uses high-pressure water streams to blast away dirt and grime. Soft washing systems use a low-pressure power washer and cleaning solutions to clean surfaces.

Pressure washing goes by many other names such as jet washing. This type of equipment is a cleaner that forces a high-pressure stream of water through a nozzle.

Pressure washing is very messy and the moss/debris can block your gutters and downpipes.