<p>is there any major grading difference?</p>
<p>I don't think so. </p>
<p>The only difference between them is that on the SAT, you have to use literary & historical examples. On the ACT, you use opinions and common sense. (i.e. schools should block certain websites because they may have virus and spyware.)</p>
<p>You also have an extra 5 minutes on the ACT essay.</p>
<p>no but if you sorta incorporate an "SAT Style" essay into your ACT essay, you can get a very high score. I got a 9 on the SAT essay , but an 11 on the ACT essay :)</p>