The two leaders also are known to have differed over the use of violence.
Both men had handled hard cases, and police differ little over the world.
Readers are likely to differ over the appeal of the changes.
The goals are not controversial, but each side differs over the right approach.
Libertarian schools of thought differ over the degree to which the state should have a role.
Both sides want to provide child tax credits to families, although they differ over the size and many details.
However trends in the activity rates of men and women have differed significantly over the last 15 years.
He and his mother have also differed over Anshu's education.
The series differed over the engines used and the cost of operating the teams.
The two leaders have differed over the direction that the struggle against apartheid should take.