Using JCR as a Data Storage vs Relational SQL DB

I am making a component to locate stores. 

The idea is to query an web API end point provided by the client that spools back across an XML string of each store and relevant data.

It is sufficient for this to be done only once per day.

To avoid making multiple calls to the API I would like to store the data parsed out of the XML.

I know how to do this in Relational SQL DB.

I am going through the ADOBE documentation tutorials on creating data persistence through the JCR.

My question is simple. What are the benefits of using the JCR vs a Relational SQL DB for such a task?