The graft point is at 1 and the 2 shows that the foliage of the graft and the stock are not the same. Both are Ficus microcarpa but not genetically identical.
Close up of the graft point, 1, shows the mis-match in the bark color and texture
Grafting figs
Grafting is a very useful way to improve a fig. It can add branches, new roots or thicken trunks. One factor to keep in mind is to graft identical parts together. Simply use material to graft, the scion, and the stock that are genetically identical. If this is not done the bark and foliage will be a mis-match and not suitable for bonsai.