Well for those interested, here is how the "Dorset naga" was "developed". In my opinion they are definitely still just naga morich. I can not tell the two apart when grown side by side. They look, taste and grow the same for me.
http://www.dorsetnaga.com/ (click developing the dorset naga on the side)
http://www.dorsetnaga.com/ (click developing the dorset naga on the side)