<p>Good question, but you can't compare by percentiles, because different populations take each test. The only way to do those concordance tables that makes any sense is to look at the population of kids that took BOTH tests and compare the scores.</p>
<p>For the schools you list, look at the percentages of kids who submitted SAT scores vs. ACT scores. Like at Pomona, 93% submitted SAT scores and 26% submitted ACT scores. That means 19% submitted both, and their highest score of the two tests was probably used for admission. The discrepancy in the ranges is more a reflection of the differences in the populations using and submitting either or both tests than admissions practices. Furthermore, those are the score ranges for the middle 50% of enrolled students. They're merely descriptive of the freshman class, not statements of admission criteria. There are so many other factors that go into the admissions process; the kids with the lower ACT scores must've had other things going for them, which likely include, among other things, higher SAT scores. It's also possible the kids with the higher ACT scores, or those with the lower SAT scores, decided to go somewhere else.</p>