I had the most terrible difficult climate in the last three years,so,very few ripe fruits,of the cultivars discussed above got ripe.
Meanwhile another small plant grew and had fruits and it seem similar to the 2 above,and i have it under the Preto name.
According to my results,Madeira Black Ital 258,and Preto,are very similar.
The difference is the health of the plant.
Ital 258 is the healthiest one ,Madeira Black the most diseased.
That is why,Ital 258,makes larger fruits,and ripe earlier and more often in cool unsuitable conditions, compared to the other 2.
As a matter of fact,it did ripe fruits this year,while Madeira and Preto,did not yet,today Oct. 27 2013.
My opinion:If you want,Madeira black or Preto,grow Ital 258,it will make you smile more often.
If you want,a white fig,as,Adriatic,Calvert,Verdal Longue, Ischia Green,Verte or Monstruese,Grow Adriatic Jh Strain,and again you will smile more often