<p>I know that the BB has the same 10 tests since 2005. I was wondering if I studied using QAS it would be more effectice or will it just be the same thing?</p>

<p>The main difference is that QAS are previously admisinstered tests, so you will get an accurate score while the BB (tests 4-10 I believe) are not so you only get score ranges.
I would save the QAS for final prep before you take the test for the most accurate score.</p>