Since acing the BC Calculus exam with a 5 as a high school student, Devin Henson has gone on to receive a B.S. and M.S. in Mathematics, founded an online tutoring company, and become a fulltime math instructor at Midlands Technical College in Columbia, SC. Devin regularly teaches multiple sections of Calculus I,II, III and Differential Equations each semester. He recently received the NISOD Teaching Excellence Award and routinely has good end of course reviews, such as “[Mr. Henson has] excellent detailed lectures. He is very good about reviewing important information the students may or may not recall.”
Calculus AB and Calculus BC are both designed to be college-level calculus courses. As such, the main prerequisite for both AB and BC Calculus is Pre-Calculus.
You’re less likely to be overwhelmed and burn out in AB Calculus, as well. Since BC Calculus has to cover more material in one year, at many schools it has more frequent and harder assignments. AB Calculus is definitely challenging, but it doesn't move as fast, so it's less likely you'll fall behind.