Grammar is your friend.
Daemonhunters, as i see it, is a bit more open to handel more things. They are not SO focused on killing Daemons, but they still can. And very easily.
Witch Hunters have a lot more focus on psychers. Yes, you can have a force that can still fight anything you want but, they have a lot more specilization.
EDIT: Im not sure what happened but, the post i made to respond to the person below was made into a new topic. Please lock/delete this. Realy sorry....im not a hotel net connection and something screwed up.