Jorge, it is almost impossible to do a completely 'fair' comparison, I am a just greatful that someone is trying to make some sense of what to this point has been borne out by experience and word of mouth.
Most people will agree that a master of their medium will pick subjects and conditions that suit their process. Not many negatives print equally well on platinum and AZO.
Another thing that has become apparent from this article and the one on pyro stain, is that Pyro expands the scale of the highlights on the negative, which will in turn expand the scale on the print. This probably helps AZO achieve the long scale look, especially in the highlights.