The replacment set on my car look like the drum in the first picture at the begining of this thread. Unlike today's trend, the drums were drummed? up by a high-level parts person, and I doubt that he would have subsituted for a lessor part.
They were purchased, new, in 1987, and the price was a healthy 'horse pill,' somewhere in the neighborhood of a buck-twenty-five/thiry each in 1987 dollars. The rears, purchased the same time were much less but were still a healty horse pill at about $60 each.
The incorrect drums, the ones with the additonal area in the cooling fins are obviously better quality and design than the correct one. With something like brakes, why would anyone want to use a lesser quality part in the name of correctness?