Hypothetical imperatives are formulated after considering various plausible hypotheses; categorical imperatives are rules of thumb that can be applied instantly.

Categorical imperatives are commands that only have to be followed if the chances of success are high enough, whereas hypothetical imperatives always apply.

Categorical imperatives are applied and practical, whereas hypothetical imperatives are purely theoretical.

Hypothetical imperatives depend on the agent's aims; categorical imperatives apply independently of the agent's aims.

The application of categorical imperatives is limited to one category of actions, whereas hypothetical imperatives apply universally.