Unknown; the captains of the Gotei 13 are the only characters whose stats were ever revealed in the databooks. In terms of physical strength and endurance, Rukia is probably a bit stronger and quicker (even being able to hold her own against the ninth Espada). Her Zanpakuto can also inflict more damage than Hanataro's. And although Hanataro is a seated officer, he shows that his best skills are in healing. Rukia has the strength to be a seated officer, but her brother, Byakuya Kuchiki, removed her name from the list of candidates.