For most HS and College combinations, AP Calc BC is very similar to two semesters of college Calculus. On the other hand, it is MUCH less common for any AP Physics class to cover anywhere near the same material and Physics course for Physics majors or Engineers.
If he is considering a Physics major I would suggest a frank discussion with a few upperclassmen and an adviser to see if it is a good idea to take AP credit for Physics. Some people will advise you to take the credit because college Physics is a difficult class to get a good grade in - I always thought that was the wrong thinking for people who were going to need what they learn for future course work.