Dr. Kirk discusses the difference between Biblical Theology and Narrative Theology in this post:

Narrative Theology also stands over against the notion of biblical theology enshrined in Gabler‘s famous “On the Correct Distinction Between Dogmatic and Biblical Theology and the Right Definition of Their Goals.”

Gabler suggested that the job of biblical studies was to distill the truths from the Bible, to be handed over to the systematicians for proper and logical ordering. Such a vision holds onto what Narrative Theology will always deem a mistake: thinking that “systematic theology” is the real thing, whereas biblical theology is a road on the way to theology’s completion.