There is no difference, according to the federal student aid website. In fact, there is no mention at all. That said, there are three important points to keep in mind.
First, you need to realize that there is a federal date, which is June 30th. All of your paper work must be in by this date. If you made any errors, then there is another date for corrections, which is usually September 17th.
Second, there is also a state date, which is variable from state to state. What you need to do is to go on the fafsa website and select your date. Here is the website: https://fafsa.ed.gov/deadlines.htm#
Third, you need to check your school. Each school has a different deadline. In other words, school may or may not follow the federal government, especially private schools.
Staying on top of these dates is essential.