it will pull a light duty 6' er .. but i would only use it for pasture clipping or light sparse brush. a 5' on the other hand can cut just about anything the front axle can make it over. w/ a 5' I've cut 5-7' tall overgrown stemmy weeds in 1st gear, max throttle, standing on running boards to see.
howse / kk are medium duty units. the lower weight makes it easier on the hyds.. etc.