Pete,
When I first started researching fig cultivars in the forum archives, I came across information about "flavor groupings". I set about acquiring and tasting figs in each group.
The flavor groups, to my understanding are;
Sugar...Improved Celeste, Eastern Brown Turkey, O'Rourke, Etc.
Honey...Italian Honey, White Marseilles, Atreano, Etc.
Adriatic...Adriatic JH, Conadria, Green Ischia, Etc.
Bordeaux... VDB, Mission, Vista, Etc.
Dark(Black)... Sals EL, Hardy Chicago, Dark Sicilian, Etc.
Each flavor group has its distinctive taste, and each can be differentiated just by tasting (a ripe fig). I have found that this helps to organize the different cultivars that are being tasted and trialed. It also helps when eliminating cultivars, by choosing only the best tasting in each group. I have also noted that partially ripe figs all have the same melon (watermelon rind) flavor.
Many of the dark unknowns that I have tasted this year have a similar flavor profile, sweet, berry and mild fig. The first VDBs of this season also had that same profile but they weren't fully ripe, I'm sure they will get that rich VDB flavor once they are allowed to fully ripen.