lightning bolt NEVER IN THE HISTORY OF THE WORLD has been directed in the way Kirin was, and if it did it could accomplish what Kirin did without any trouble. An actual lightning bolt HAS NEVER properly HIT any target, save, say, if a plane somehow got caught in the middle of one in mid-air. Lightning barely strafes targets with its outer edge, and yet it's still enough to cause young children nightmares and is one of the most impressive examples of the forces of nature in action.
Kirin is, in effect, a spread-out single lightning bolt that's under Sasuke's control. While that is a SCARY thought, it's still just A lightning bolt under Sasuke's control, and when it comes to concentrated destruction Hell Stab or even Raikiri are easily provable to be stronger.
Look at my earlier posts in this thread for the mechanics of it.