Honors usually involves the use of additionally projects potentially for the semester. Younstill learn the same material as you normally would, but the extra work is designed to make you work and would provide a gpa above 5.0 for the class.
AP courses or advanced placement are designed to be much harder but with a good reason. Taking AP allows one to earn AP credit or college credit for which they can use in college or University. I'd personally prefer doing AP because it could limit the time for how much physics you study when you move on to the next level.
