The culture and vibe is definitely different between the two schools. What drew you to each of the schools when you chose to apply? How do you feel about the Core at Columbia? How do you feel about parientals at ND?
Are you interested in pursuing a PhD? If so, it might be worth looking into how successfully students are placed in those programs post grad.
If it’s a job post grad, both have well developed alumni networks. But if you’re interested in working in NY for example, Columbia might be the better choice.
Both are fantastic options. It really comes down to where you’ll feel most comfortable.