Whether to submit more than required amount of essays?

I am using the ApplyTexas app (which offers 3 essay topics) and am applying to a school that only requires one of the essays (about my background/how I was brought up). However, I feel like that topic doesn’t capture what I want to say about myself. I want to submit an additional essay to one of the other prompts that would better explain who I am as a person. Would this be beneficial, detrimental, or neither?