With respect, I don't think, that it is like trying to compare apples and oranges. It is like a blind man feeling the various parts of an elephant and coming up with different perspectives and descriptions of what he has felt! The danger is in trying to distinguish between them too much. Look at Calvin's Institutes -not what would be described as a Systematic Theology by latter standards. Look at Turretin's Elenctic Theology, not fully Systematic by the standards imposed later on. Look at any Christian Dogmatics by the Lutherans and Dutch Calvinist Theologians. Not very clear cut is it? Even Biblical Theologies have a systematic outline to them. The human mind lends itself to coherence and order and so even narrative descriptions are systematic as God's revelation is systematic.
