as far as temperament they weren't aggressive when i picked them up...they dont want any thing to do with me since they have been here...they dont pick on the pekin ducks in fact the ducks are such piggies i had to put some food in a higher place.
I would say Hatchery Africans, I have both, I see a slight dewlap on one..
Heres a pic of each of mine for comparison....
One of My Brown China Ganders...
My Brown African Young Gander (6 months old in the picture)