<p>If you have a guaranteed admission to that program and you are “50/50” re Duke pre-med, take the sure route. If test performance is an issue, the MCATs are more difficult than the SATs. MCAT performance is generally correlated with SAT performance. You will DEFINTELY have to study harder for the MCATs. By the way, the format of the MCAT is changing with more emphasis in critical reading and reasoning.</p>