“…evidence of our ability to work well together and then emphasizes our different passions + solidifies our individuality could stand out?”
The ability to get along with your sibling isn’t one of the factors a tippy top is looking for. The ability to get along with a broad range of people, sometimes working with them, other times, for their benefit, is a good aspect. See the difference? One is turned inward/the ‘best friend’ angle. The other is a broader atttribute or skill.
And be sure you understand what the essay is meant to convey. Choosing to emphasize your shared activities (or even a few differences,) could leave them wondering if you’re joined at the hip, have a limited pespective. (Similar to kids who write an essay about not wanting to leave a younger sibling. What’s that show the adcoms?)
The quads are close, but each was his own unique self, first and foremost (as far as their apps.)