In comparison to the aged brush and pole process, there is none. I joke with my clients stating I experience like I should give refunds to everyone who I cleaned with a brush. The spinning method does a a lot better career. The spinning system also incorporates glazed creosote elimination. https://www.google.com/maps/d/edit?mid=1WVaili4QDuk6WJlHgTeM8_wjfB3Sibc&usp=sharing