For all practical purposes, Power Washing and Pressure Washing are the same and can be used interchanageably.
Technically, Power Washing uses hot water to clean surfaces, while Pressure Washing uses cold water. Power Washing is typically used for more heavy-duty commercial cleaning jobs, such as gas stations or removing paint or graffiti.
In contrast, pressure washing is better suited for lighter cleaning tasks, such as driveways, walkways, sidewalks, curbs, decks, and house washing.