An American friend raved about his xaphoon a while back, to the point where I nearly rushed out and bought one. "Portable as a G whistle, sound of a soprano sax" was (more or less) his summing-up. "Put it in your jacket, whip it out at traffic lights," he said.
Can a duduk do that, eh?
(I have to admit, I've got a G whistle and have never felt the urge to put it in my jacket and whip it out at traffic lights.)