How is Napoleon a more successful leader than Snowball in Animal Farm?

I think that Orwell makes the argument that Napoleon succeeds in
asserting control because he was concerned with both the revolution and his position after it.
Part of what makes Napoleon so successful as a leader is that Orwell constructs him as a leader
who has one eye on the present and another on the future. For example, in chapter 3, Snowball
exerts his energy organizing the animals into committees, while Napoleon takes the nine pups for
his own. They will later become his guards and his own "police force" that will instill law and
order when times are difficult. This is most notably seen in chapter 7 and the forced confessions
moment. The fact that Napoleon is operating in a position to consolidate his own power both in
concert with and divergent from the revolution is what makes him so successful in maintaining and
increasing his power over Animal Farm. It is in this light that Napoleon is seen in both his most
cunning and most brutal form as a leader.