The Short Answer
Both tests are accepted equally by all US colleges. The best choice depends on how your student handles time pressure, question format, and content mix. A diagnostic session with practice sections of both tests usually makes the right choice clear within an hour.
At a Glance
Test Structure
SAT — Adaptive, Digital Only
ACT — Linear, Same Test for Everyone
Key Differences That Matter
Which Test Should Your Student Take?
There's no universally "easier" test. The right choice depends on how your student processes information under time pressure, handles different question formats, and where their content strengths lie.
Students who prefer more time to think through fewer, harder questions often lean SAT. Students who are fast but need breadth across more topics often lean ACT. But the only reliable way to know is to try both — a diagnostic session with practice sections of each test usually makes the answer clear.