I suppose if you’re in high school the answer to the question might not be obvious. Anyway, if money is an issue, go to Purdue. The difference in rank isn’t that meaningful.
Can your mom and stepdad afford to pay for Purdue out of their $80k income? Did you get the noncustodial waiver for your dad or don’t you need it for Purdue? In August you said your mom thought you could pay your own way through school and was threatening to throw you out when you turn 18 over arguments about college. Have you worked those issues out? If I remember correctly, they’re not paying much/any for the colleges your sibling and step sibling are attending. Did your mom and stepdad actually say they’d pay for your college?