Fit is important, especially if you’re going into a demanding major. You need a support system and the male/female ratio at Stevens may be a great dating statistic will your D find her people? Since she wants to end up in or around NYC she might enjoy having her college experience in a different city. Have you visited any of the campuses?
My S17 looked at Stevens and he liked it (and applied/was accepted) but felt the campus was cramped (although the NYC skyline view from the dining halls was magnificent) and the energy somewhat subdued. He ended up at Lehigh in their Computer Science/Business major.
One of his close friends is a senior at CMU and has loved his time there. Great research opportunities and relationships with professors. Supportive friend group and Pittsburgh right there. He does work hard but he’s that kind of kid.
This might be also worth a read Why you should avoid Stevens
It’s one opinion but it’s someone who is a current junior.
As far as Northeastern, I don’t know much about the CS or engineering departments. My D19 applied and was accepted but decided the transitory nature of having your friends coming and going due to coops wasn’t the college experience she wanted.
An accomplishment to have such great choices in any event!