Originally Posted by
KCMmmmm
Well, I don't think either is really inferior, they are merely different techniques. The Shouten is designed to give the user complete control over the bodies sacrificed. So much control, that their chakra takes over entirely, shifting the shape of the 'possessed' to suit the appearance and technical level of the user.
On the other hand, the Edo Tensei is a jutsu which morphs sacrificed bodies to bring back the souls of the dead in those bodies, at which point, it appears the souls still contain their own personality and consciousness. (Remember that Orochimaru had to place kunai with exploding scrolls attached into the minds of the first and second hokage before they would even fight the third.) I especially like the way in which Orochimaru turned that jutsu to his advantage: having the third battle his respected predecessors certainly unnerved him quite a bit.
Essentially, these two jutsu are complete opposites: the first mentioned uses living sacrifices to allow a living person to take control over the possessed body. And the latter utilizes a dead sacrifice to give the soul of the dead control of the body. They both have advantages and disadvantages.
DarthEnder: thanks for pointing that out, I must have forgotten that bit of dialog. Good point.