I have worked in a position where I repaired all of these brands, and can say that at least in the last two decades Stanley Black and Decker Inc. has been very

I have worked in a position where I repaired all of these brands, and can say that at least in the last two decades Stanley Black and Decker Inc. has been very strategic with product positioning and continued support for all of their brands. DeWalt is supposed to be their professional (or probably prosumer) line that's built to last, or at least to be repaired. Black & Decker, which had been a higher-end brand before the 90s, is now pretty much all "happy homeowner" tools built out of less durable plastic and often without replacement parts available. Porter-Cable seems to fall in the middle, a bit closer to B&D. There's a certain 20V compact leaf blower that I've seen branded as a DeWalt, Ryobi, and Milwaukee. I'm not sure about the motor or controller but the plastic casing is almost identical aside from the color and battery connector. It's also interesting to note that the B&D and the Porter-Cable 20V batteries are identical except for a plastic tab that prevents interoperability.