Every individual school is unique.
That sounds like a truism and not a very helpful one either. Shall we make that thought a little more specific?
Every school has its own unique set of admissions requirements. This is especially true when it comes to standardized testing. Although individual components may be similar—SATs, ACTs, essays, and SAT Subject Tests—the way colleges and universities pick and choose from these elements is far from standard. Rather than making an assumption about what a university wants to see from an applicant, your best bet is to familiarize yourself with testing requirements at each school you are interested in.