I can't say which is better, but due to personal experience, I highly recommend that everyone take both before they complete those college applications. Years ago, when I was applying for college, I did well enough on the SAT to qualify for a scholarship, but was only 10 points away from the next scholarship level. I tried the ACT, and not only did I hit the next scholarship level, I went up an additional level. Fast forward several years and my DD took both the SAT & ACT, one through Duke TIP & one through CTY. Her ACT scores were state award level on everything but math. Then, we got her SAT scores - state award level only on math. For what it's worth, this DD has dysgraphia type issues, with a very low visual/motor integration score and she didn't have accommodations on either test.
