Frank, of all the cold hardy figs the wife and I are testing, we have had the longest experience with, Hardy Chicago, Sals's EL, Marseilles Black VS, Hardy Hartford, and Danny's Delight.
These indeed are duplicates in taste to either each other, or to other figs we have in our collection. They all have strong points and weak points.
But, for us, getting great tasting figs in a cold wet zone 5a/6b, we have to concentrate on cold hardiness first.
It makes no difference how great the fig has been reported to taste, if it gets killed by our cold New England Weather.
At one point in time I was considering pulling out some of them because they appear to be some duplications in taste. But what I found was that each year, they all performed differently.
To my taste buds;
Hardy Chicago and Danny's Delight have the same taste profile. But, to my taste, Danny's Delight is a more spiced up berry tasting Hardy Chicago.
Marseilles Black VS, Sal's EL, Gino's Black, and Hardy Hartford have to me, the same taste profile, figgy and sweet. But, Sal's EL keeps that very sweet taste even when we have a very wet and cool summer.
With our other 24 or so figs, they also have strong points and weak points, and I have learned to appreciate them all in one way or the other.
If I were you and you really need the space, instead of pulling some out I would graft onto the ones you want to get rid of, with the ones you want to keep. But, I would keep at least one cane of the ones you want to get rid of, that way you may notice later on, they have certain merits worth keeping.
Bob @ T. Pine