Muller continues his discussion with this key statement on page 46: “No small part of the task of describing properly the work of Protestant orthodoxy belongs to the discussion of its relationship to the Reformation. In its simplest form, this relationship is one of broad doctrinal continuity together with methodological discontinuity. Of course, the relationship is considerably more complex than this basic statement: methodological changes bring about changes in doctrinal statement if only because careful systematization of an idea tends to remove elements of tension and paradox resident in the initial, unsystematic formulation.”
This statement plainly proves that Muller’s position is firmly against the “Calvin versus the Calvinists” school of thought (he says this explicitly many times elsewhere). As noted in the last post, it was historical changes that were responsible for the changes in wording and method. This does not indicate a change in substance of doctrine.