To my fig friends who have Socorro Black, please start a thread, add to this one, or send me a PM or email to share how it is growing where you are.
Luke,
I agree with Jose.
I have Black Madeira from UCD in the ground and in a pot. I also have another Black Madeira in a pot from a non-UCD source. Although it has fruited (and has fruit right now), BM has ripened exactly one fig in three plus years and that one was inedible. The fruit presents itself differently, the fruit shape is similar but Socorro Black has a concavity on the top that I have not noticed with Black Madeira. Finally, the pulp of Socorro Black (here in Florida) has a cavity that I have not yet noticed with Black Madeira.
As I type this, there is one Black Madeira that is trying to ripen. If the birds do not get it, I will. Unfortunately, I can almost guarantee that it will be tasteless and bland because there is not enough heat.