I'm sorry I don't know much, I've only grown the green type and they don't really like growing in Wisconsin much! they did not start to sprout until frost!

I grew Diamond Head last year and loved it. Am waiting to see if it will return out in the garden this year, but I potted up an offset and have it in the garage just in case. It has a great sheen (and therefore light reflective quality) to the leaves and has a different look than 'Black Magic' because of that, but I'd call it 'equally' black in its impact in the garden. Mine was about 3' tall but would probably have been taller if I'd watered it.