<p>Or are they about the same.</p>
<p>The reason I'm asking is because on one of the college sites, you can get into Calc 3, Multivariate Calculus, with a 4 on BC or a 5 on AB.</p>
<p>(This, arguably, means that BC is not that important since this top university doesn't require it for Calc 3, which is a reflection of the fact that only a small part of BC is not covered in AB.)</p>