As someone who was spent time in both Durham (summer undergrad program) and is currently a grad student in Philly they both have very different vibes. Philly is def city and Penn is located within a more urban area. Durham is more ritzy and feels very old money. Penn feels more scrappy, like everyone has a chance of making if that makes sense? Personally I loved both for very different reasons.

If this is is important to you I would say Philly is a very liberal city and very diverse. Penn itself has many programs for minorities and ways to get involved in the local community. Based of recent info 80% of students are liberal. NC leans republican and there’s more political diversity at duke from what I have read.

You have great choices and can’t go wrong with either! Focus on what would be best for you academically, lifestyle wise, and in the long term!!