I was the same person who was looking for lots of answers regarding this question just after jee mains result came 15 days before advance Most of them use to say-” it's nearly the Same” and some of them improved their rank by 2 to 3 times.

I only focused on Jee Advance. I only gave 6–7 mock tests for jee Main total and 7 days before jee mains I used to revise the formula and short notes and the rest of the time I studied only for advance and gave lots of advance mock tests

Jee advance 4037

Jee mains 8037

The exact difference of 4000😀

Both are different exams don't worry if you score less in mains keep going you will score far better in Advance

ALL THE BEST 👍👍👍..