The young one ,is an early ripening cultivar,and the older one must be a late ripening cultivar.
Late cultivars are not ripe yet in your zone 8.
Place a lot of mulch and limestone powder under the fig that does not want to grow.

Thanks for the tip.
I checked this morning and found that the one that has been growing like crazy, producing a ton of fruit AND has already produced a 1/2 dozen ripe figs is a Magnolia fig.

The other fig plant that is not growing, but not looking ill either is a Celeste. I am still working on finding the ripening time for each variety...

According to this web site...
http://edis.ifas.ufl.edu/mg214

The Celeste is an early July and the Magnolia is a late July / August ripening fig plant. Something is wrong with this picture. The Magnolia is doing fine and is on schedule. However, the Celeste is the one that set fruit, but they are not ripening..