On a scale of 1 to 10, your typical C172 being a 2-3, a regular taildragger being 5-6, the Pitts would be a 8 back seat/9 front seat, and the Zlin is a 6-7, 7 only because it is extremely sensitive even at low speeds. You have to find the razor edge of control, but once you get it, it's becomes natural.
EDIT: With the Zlin, imagine a joystick with absolutely no dead zone and inmediate response with the slightest movement of the stick.
Daniel