I think its fairly obvious that in a test of speed, kirin would win, and in a test of power kirin would win. If the two attack collided together, kirin would probably win. This seems to be supplemented by the fact that it uses the vast energy from nature and is supplemented by the user's own chakra; a very potent combination. However, kirin is not as simply produced the way naruto's rasenshuriken is and requires a level of time commitment to manufacture if a storm is not already present. Additionally, considering the aftermath of each technique, itachi has already shown us that a strong ninja can withstand the attack and continue fighting, even the the attack itself is impossible to avoid. On the other hand, naruto's technique can be avoided, destroyed, or cancelled, however, if the attacks hits, death is almost certain and in the event that the victim somehow survives, their ability to manipulate chakra is removed, thus almost an instant victory for the opponent. In summary, though, yes kishi is a stronger and easier to strike with once summoned, i believe that rs is the more versatile and useful of the techniques, and if landed, more certainly assures victory. But head to head, kishi wins. I'm open to debate on this one.