<p>So I have both the Princeton review and the barron's book for the Calc. BC test and I'm finding that the questions in the Barron's are a lot more difficult. For the practice tests, the amount I'm getting right in the PR book is half what I get in the Barron's. Is the Barron's that much harder than the AP test?</p>
<p>yeah, big time. Barron’s and the real tests had like a 10% differential for me. Don’t use the practice tests from Princeton though to gauge yourself, use something harder (old tests!). But in general, people prefer to study from Princeton Review because their material is a lot easier to grasp. I used barron’s as a secondary review book, to make sure that Princeton was in fact covering everything and going indepth enough.</p>