Question

Three major differences between anti-Catholic sentiment and anti-Mormon sentiment.

Answer 1

Anti-Catholicism is hostility towards or opposition to the Catholic Church, its clergy and adherents.Catholics in Protestant countries were frequently suspected of conspiring against the state in furtherance of papal interests. Anti-Mormonism is discrimination, persecution, hostility or prejudice directed at members of the Latter Day Saint movement, particularly The Church of Jesus Christ of Latter-day Saints.

Answer 2

A Mormon chief was slaughtered by the individuals who didn't share the Mormon faith, however no Catholic religious leaders were executed.  

Catholics dealt with segregation when they were migrating because of local nativism, while those who were hostile to Mormon had different reasons.

Anti-Mormon discrimination incorporated a compulsory relocation, while those hostile to Catholics didn't go that far.