Another way is through their reactions to difficult situations. Naruto's immediate response is often to charge in headfirst, relying on his guts and the Nine - Tails' power. Yakumo, on the other hand, might be more cautious and think things through. A story could be written where they have to decide on a course of action in a dangerous situation. Naruto's impulsiveness could put them in a tight spot at first, but Yakumo's more measured approach could save the day in the end, and through this they both learn from each other.