Taking full-length practice tests of both the SAT and ACT is the best way to determine which test suits you better.
Convert scores to compare:
Which test felt more comfortable? More natural? Less stressful?
Understand WHY you missed each question - that's where the learning happens.
Focus your prep on whichever test plays to your strengths.
Continue intensive prep
Junior Year
Submit selective summer apps
Sophomore Year
Register for March SAT
Junior Year
Take March SAT
Junior Year
Document achievements
Sophomore Year