Narrative reviews and systematic reviews might be the same, depending on presentation. Many researchers claim narrative reviews are presentations of major finding in the literature and might be less systematic. See the following articles for explanations and examples.
Byrne, J. A. (2016). Improving the peer review of narrative literature reviews. Research integrity and peer review, 1, 1-4.
Rother, E. T. (2007). Systematic literature review X narrative review. Acta paulista de enfermagem, 20, v-vi.
Vermeir, P., Vandijck, D., Degroote, S., Peleman, R., Verhaeghe, R., Mortier, E., ... & Vogelaers, D. (2015). Communication in healthcare: a narrative review of the literature and practical recommendations. International journal of clinical practice, 69(11), 1257-1267.