Yes, they both use gpa and scores, but they may not have the same cut offs. To get into Alabama, I think many students do it without a 3.5/32 ACT. To get the highest scholarship, that’s what you need.
The student who has a 3.49999 unweighted is going to hope his high school calculates honors classes or AP with a bonus, raising the weighted gpa to 3.6 or 3.9. If not, the student still gets to go to Alabama, just doesn’t get the highest scholarship. Admissions often uses more than just the statistics while scholarships are often automatic with the right statistics. You can overcome the 3.49999 for admissions but not for the scholarship.
My daughter’s scholarship was based entirely on the gpa/ACT, and they do not round up. If the gpa is 3.4999, you will get a different amount that 3.5. If your ACT is 25, you will get a different amount than a 26. Any combination of those will get you into the school.