Many websites mention that black jack is the same as black spanish, but is it?
Jon, I think you have both, are they the same fig?

Black Jack, Black Spanish, Blue Giant, Brown Turkey - they are all very close in many ways. I would give the Black Jack the edge on being a little more like Black Mission than the rest. This was the best season for all of them that I have had. More juicy, more on the strawberry side than any previous year.

What Jon said about Black Spanish, Blue Giant, (California) Brown Turkey also reflects my experience.  However, the Black Jack I have (Willis Orchards) is very different from the others.  It is smaller than these figs and distinctly pyriform in shape.  I only had a few figs this year from my young tree, but I have reason to hope the flavor will be richer than what I've experienced from the other figs mentioned.

The Black Jack fig I have (org: Monrovia), via my only fig from James, is a
BIG fig-monster...  I have a pic of one somewhere on a FF; I will point it
out when/if I manage to find it. 

Here's a photo posted by alb419_ny, he calls it Mario's black jack.

Kinda looks like my unknown in a way on outside but mine seems darker color maybe.

I have figured out why Martin's unknown fig looks so big!
 
That ain't Martin's hand in the picture, it's his little Boy's hand!
 
HEHE
 
Cecil

H a Ha there Cecil, im looking at those figs and miss em already!