~ Divergent has multiple factions while Delirium has two groups depending on who their government leader is that they support.
~ In Delirium the evaluation decides the rest of your future and if you'll go to college or not, but in Divergent the test only decides what faction you'll be assigned to, but you still have the freedom to decide how your life will play out.
~ In Divergent their society is run by Jeanine Matthews, the leader of the faction Erudite. While in Delirium the society is run by all of the scientists who developed the evaluations.
~ In Divergent their is only one suprem leader while in Delirium there is a leader in each group of society.