I had far fewer aggression issues with buttons than I have with coturnix. I never had a button scalp another.I used to breed caged birds, and one year I got into button quail. They were cute and they had neat color genetics to play around with, but they were WAY more trouble than they were worth!!
The males fight and scalp each other and even get aggressive with the females. I had to keep separating them into different cages until they were all housed separately. I finally just sold them all.
The little tiny babies were sure cute when they hatched though!