How did Napoleon and Snowball disagree over the future of the revolution in Animal Farm?

We learn that Napoleon and Snowball disagree

at every point where disagreement was possible.

A main point of dispute is the building of the windmill. Snowball is vey enthusiastic about this and even draws up plans, but Napoleon is completely opposed. Snowball believes that the electricity generated by the windmill will eventually make life easier and better for the animals, while Napoleon believes--or says he believes--that they will all starve if they divert all their resources into building a mill. He even literally urinates on the plans.
Another area of dispute is defense against the farmers. Napoleon wants the animals to procure and learn to use guns, while Snowballs wants them to concentrate on sending out pigeons to try to incite the animals on other farms to rebel.
Snowball is smarter and more efficient than Napoleon and a more persuasive speaker, but Napoleon is willing to use power in ruthless ways to achieve ends, so he runs Snowball off the farm. Snowball would like to implement a successful revolution and build a workers' paradise, while Napoleon is only interested in personal power.