The discussion centers on the comparative difficulty of calculus-based courses in college, specifically Electricity and Magnetism (E&M) versus Dynamics. Participants generally agree that while both subjects present similar mathematical challenges, E&M is often perceived as more conceptually difficult, particularly at the junior and senior levels. Some individuals found E&M harder than classical mechanics, especially when they had a solid foundation in multivariable calculus and differential equations. However, experiences vary; some reported that they found classical mechanics easier, even at advanced levels, and noted that prior mathematical knowledge can significantly influence perceived difficulty. Overall, E&M tends to be viewed as more challenging, particularly in upper-division courses.