I have never had any of those but have heard that they are super friendly and not skittish like a lot of the rest of them.Never heard of a different rump color. Glad it worked for you. I don’t have much experience with khakis, I’ve mostly had other breeds. Never stuck with one long enough to really know them, but I’m slowly switching to an Ancona flock, at least for drakes. Probably will keep my hens for a while yet. I really like them all.