The difference between a janitor and a custodian is primarily in the scope of their responsibilities. Janitors typically handle general cleaning tasks, such as mopping floors, vacuuming carpets, and emptying trash bins. Custodians, on the other hand, may have a broader range of duties, including maintenance and repair tasks, as well as overseeing the overall cleanliness and safety of a facility. While the specific responsibilities can vary depending on the employer, custodians generally have a more comprehensive role than janitors.