The Ford Super Duty sees just minimal changes on all three models for 2021. Some new interior amenities and adjustments to trim features come with the F-250, while a bed step is added for the F-350 and F-450 this year. The Super Duty model series starts with the F-250, followed by the F-350, which is very similar in appearance and amenities. However, the F-350 has enhanced power and performance capabilities that allow it to tow over 24,000 pounds. The Ford F-450 is the strongest of the Ford Super Duty series, with a towing capacity of 36,000 pounds.