Dartmouth is not more prestigious than Amherst.
In the end it’s not going to be which college you went to that will matter, but it will be who you are and what you have to offer that will matter. So, the question is where are you more likely to thrive? Either will provide the resources to support your growth. It’s about where you feel more comfortable. Your father already went to college. This is your turn. So choose the one that feels right to you, and don’t look back. Go forward.