I grew Francisca Habs this year and I have had a few of the double peppers. I also grew Chocolate Habs(which all ripened orange). The Franciscas are a much denser, longer pepper than the Chocolates and I got a much greater and much more interesting range of shapes and sizes from the Franciscas. Some of them folded up inside themselves and seemed double walled. I also grew Brandywine tomatoes and a majority of those were Siamese fruits. The thing that I found funny about the tomatoes was that one side of the tomato would ripen before the other so I'd end up with a Hugh half bright green and half intensely red tomato - just right for Xmas!!