Obviously, they’re both important, and obviously I’m gonna put my best effort in all of them and make sure they’re both good.
But, what would you say has more importance — say, a 650 Personal statement or a 400 word supp?
What if a school has two supps? Are those two supps collectively about 2 times as important as the personal statement for that school specifically?
I don’t think there’s any way to say. In fact, I’d say whichever essay makes the admissions officer say, “Wow, this kid would be fun/interesting to have in a class/as a roommate.” I suspect that for my younger son, at Tufts it was a supplement essay, at U of Chicago, he got a comment from the AO about his funny “Why Chicago essay”. Most essays don’t make much of a difference at all. One AO said at a school presentation, "A few essays are so wonderful that they might make a difference. A few are so terrible, that they negate anything good in the application, but most just confirm what they’ve already heard from teacher recommendations, and the other material in the application.