In Animal Farm, what are some similarities between Napoleon and Snowball?

Napoleon and Snowball play an important role in Jones's overthrow.  They are similar in how they sit in the front row when Old Major delivers his address on Animalism. Both pigs are similar in the way they absorb these lessons. They are also similar in how they share these ideas with the other animals on the farm.  

When Old Major dies, both pigs are active in disseminating the message of Animalism.  Additionally, they both...

Napoleon and Snowball play an important role in Jones's overthrow.  They are similar in how they sit in the front row when Old Major delivers his address on Animalism. Both pigs are similar in the way they absorb these lessons. They are also similar in how they share these ideas with the other animals on the farm.  

When Old Major dies, both pigs are active in disseminating the message of Animalism.  Additionally, they both occupy similar leadership roles on the farm when the humans leave.  In this regard, both Snowball and Napoleon are elevated to similar leadership positions on the new farm.

Another similarity between Napoleon and Snowball is that they possess a vision for the farm.  Snowball and Napoleon understand that a necessary part of leadership is having a vision. They are similar in the way they place importance on communicating this vision to the animals. This is seen when both present their plans regarding the building of the windmill.  

Their visions are different from one another.  Snowball sees leadership as cooperative.  He strives to forge relationships with the other animals.  Napoleon sees leadership as power that has to be consolidated in his own hands.  Despite this difference, they are similar in how they believe that vision is an essential component of leadership.