Most colleges and universities accept scores from either the ACT or SAT and do not favor anyone over the other. A few alterations made to the SAT test in 2016 made it easier than ever to prep for both tests at the same time and get competitive scores on both ACT and SAT. The best way to decide is to take a timed full-length practice test of both. As the content and style of both the tests are very similar, aspects like how you manage the time and what sorts of questions you find more challenging can help you decide which test is a better fit for you.