It really depends on the school.
Some schools take a holistic approach and others are more number focused (GPA/SAT/# of extracurriculars).
There are a number of schools that are making SAT/ACT scores optional, so check out this link: https://blog.prepscholar.com/the-complete-guide-to-sat-optional-colleges.
Another factor to focus on is your essay and supplementary essays. A lot of schools will ask creative questions for you to answer uniquely. Take advantage of these and write something that you yourself are proud of.
You can also express your uniqueness through your extracurricular activities, and DO NOT worry about having 15 activities and being the president of each one. Schools would rather you be a high contributor to something you care about than just spending 1 hour a month to have extra clubs in your name.
GPA and SAT/ACT scores are important, but the other things mentioned above will make the difference when all the numbers are the same.
P.S. If you can do a college interview, do one. It's a two-way conversation where you can also learn a lot about the school and what it's like to attend.