Well ... I have had a hard time learning about firing and trying to understand the technical side and I thought I had a tentative grasp ( finally ) on what heat work was and how it affected firing results.
So when a potter with 34 years experience ... As John has ... Says these two firings had the same heatwork, it throws me back to square one of thinking I don't understand at all.
You probably understand as much or more than most of us. It's all more art than science and as Jesus said, "Heatwork is heatwork."