This is the problem with looking at history and finding parallels. You end up finding some details - often quite important details - that look similar. Then you look harder, and find things that don't match up. You then spend your time either arguing into the wind that they do in fact match, or trying to change the details of one or both case studies, or trying to argue that those details weren't particularly important in either the past or the present. However it actually goes, by the end you've rarely got anything that's of any use, particularly for the sort of 'learning from history' that people who try to push those comparisons are usually looking for.