<p>I took the PSAT and SAT within a month or so of each other, got 80M, 80CR, and 68W PSAT and 780M, 760CR and 800W.</p>
<p>The SAT is certainly harder, has harder questions and since there are more questions, more chances to screw up (stamina issue). </p>
<p>But if you did as well as you say you did on the PSAT, you should need only minimal studying and a little bit of practice :)</p>