In Animal Farm, how do the animal's lives change from Jones to Napoleon?

Jones and Napoleon both strive to rule over the farm, Jones because he is a farmer, and Napoleon because be strives to become human. While Jones is a normal farmer, not treating his animals with any sort of excess cruelty, he does neglect them at times, which starts the chain reaction of the revolution. Napoleon, meanwhile, pretends to treat the animals better than Jones, but in reality exploits the animals even more than Jones did. Jones is not overtly evil in his treatment of the animals; they are fed and housed, and used for their milk, meat, and labor. Napoleon, however, lies about his intentions, uses the dogs as a personal army, and kills animals senselessly when he imagines a threat, all the while espousing ideals of equality.