Gurney announces that the Great Houses will not honour Paul's accession as Emperor in Dune 2's final moments. In the book, his threat to destroy all Arrakis spice mines makes the Guild and Great Houses sit back and observe.
In Dune 2, Feyd-Rautha dies differently than in the book. Both end with Paul and Feyd-Rautha's fight, but Dune 2's is more savage. The movie adaptation eliminates Villeneuve's poisoned blade techniques to test strength and competence.