Am I genuinely smarter now, or just better trained at learning skills?

In high school my grades were good but not excellent:

I got accepted into a good university because my high school was exceptional and the computer system would automatically boost your grade by 10% when you apply to university to reflect the unique difficulty of getting high grades at such a competitive school.

The second reason I got into a good university is that I was accepted into the regional gifted program before it was cancelled, so my normal grade level marks were more valuable than other people’s normal grade level marks outside the gifted program.

But now I believe that if I returned to high school, I would get high 90s if not perfect grades in every stem class, because I have had more opportunities to improve learning skills over the years.

Am I genuinely smarter now, or just better trained at learning skills?
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