Col. Littman's Black Cross,has bigger fruits and leaves.
Being called a Black cross,hints to a hybrid,and if so,the mother of it was Ischia Black.
*i think it's close, but not exact match*,your remark is true,but I have a reason for it.
On UCD Ischia Black,more than half of leaves are distorted and deformed by Fig mosaic virus,yet they will look uniform and identical,to,Jason tree if UCD Ischia Black was void of virus.
When a fig is healthy,most leaves are very similar in shape,at this time in the Summer.
The fruits are identical,just look in post #75,you will see pixies of ripe and unripe fruits from my UCD Ischia Black fig.
As for me to compare them in the future,that is a big problem,because UCD Ischia Black,made only a handful of fruits in 9 years so I do not know if i ever will have ripe fruits again from this ,plant.