I'm Gregg Weiss Owner/Founder of Optical Etching, LLC. This difference is 75 watts of power and the ability to use it where less power fails. This is where deep relief etching, occurs, High Power and HIgh Resollution and a 30" x 20" x 9" area are how the hottest showcars get their CAD/CAM laser plexi etching cut and glowing here. We are constantly finding the next spot for make our custom cut and mark for your project. gweiss@opticaletching.com Thanks again to NYABJ, Donna "My' Ride" Kessler Hot Rod Queen! at the Times Herald Record, Colm Derasmo at Design Tech, Dickie Baxter and Levi Masker at People Hookin Up Cars, and everyone who can put the dream into their ride.