Totally different machines. The Trailblazer series is AC/DC mig/stick and a wonderful package - exceptional value. The PipePro, on the other hand, is a completely other breed of cat. The PipePro is actually an ac generator coupled to a diesel engine that powers, for all practical purposes, a Miller XMT304 CC/CV welder that is mounted inside machine. Generator has enough power to run a second XMT so two men can weld with neither being aware of the other. Marvelous welding characteristics. Over a thirty year period this is the only welder we have seen that the long time pipeline professional will trade in his SA200 for. Doesn't hurt that you can run several on the fuel one SA200 burns, fits sideways in a Ford Ranger leaving the rear window usable, doesn't beat truck to death, gives 12kw AC power, runs true mig, uses a remote the size of your thumb, and finally, with the 'dual power option', allows you to kill the engine and operate on shop power. weldersales