Ok first off I used to live up north in Maryland and NY and I can tell you up there people don’t have much respect for UD, I’m just being honest… UF is MUCH more highly regarded and a top 10 public university. Second I have friends who have sent their two daughters to UD and were not impressed. Third, you can study abroad at UF for FREE using bright futures money now with the new law that lets you use bright futures scholarships over the summer if you study abroad over the summer, so don’t assume you can’t study abroad and get scholarship money to do so at UF.
UF is an amazing school with an alumni network that is HUGE all over the world that will help with job placement in ways that UD will not be able to compete. Also consider where you want to work. Even if you don’t think you want to come back to Florida your UF degree with it’s national reputation as a top 10 (some say soon to be top 5) university will be worth far more as far as name recognition and value than UD unless you really plan to settle in Newark 
As far as things to do in Gainesville vs Newark I’m shocked you think there is more there lol. Gainesville has a lot to do and also beautiful parks, lakes, hiking, shopping, etc. Plus it is less than 2 hrs from Tampa, Disney, Jax, and tons of beaches. The kids take road trips all the time for the day and weekends. There are great internship opportunities too. Just check tripadvisor! Newark Number of things to do? 37 https://www.tripadvisor.com/Attractions-g34043-Activities-Newark_Delaware.html Gaineville 79! https://www.tripadvisor.com/Attractions-g34242-Activities-Gainesville_Florida.html
In fact, if you search best college towns you won’t find ANY lists with UD’s college town on it… but Gainesville makes the list on both top 50 lists as well as the 2018 top 10 list and the top 50 college towns to live forever list lol
https://www.bestcollegereviews.org/50-best-college-towns-america/ (# 11 top 50 college towns by BCR)
https://www.collegerank.net/best-college-towns/ (#3 top 50 college towns by College Rank)
https://livability.com/top-10/college/10-best-college-towns/2018/fl/gainesville (#9 2018 top college town)
http://www.collegeranker.com/features/best-college-towns/ (#39 best college town to live in forever lol)
Going to school far away has other expenses and complications too. You need to think about how much those things matter if at all to you… like going home for more than Thanksgiving or Christmas and the summer or if you care if your parents can make it there for last minute Family Weekends or Mom’s sorority or Fraternity functions. You will have to bring more stuff with you to cram into a small dorm room since you can’t just drive home for a weekend to get your formal dress or warmer clothing or a theme item for a party and getting your stuff up there and home is a hassle too since you will probably fly and have to ship stuff. If you get sick it can be scary to be far too. My daughter had to go to the hospital freshman year and we were lucky to be driving distance to meet her there. Her roommate had a similar issue but had to settle for us helping her since her parents were all the way in Philly. When finals came my daughter left to go home an hour after her last exam. Her roommate was stuck for 5 days because she had to book her plane ticket months before so she booked for the last day of exam week. You can’t book tickets for things like Christmas break and Thanksgiving at the last minute because it’s really expensive but you also don’t know your exam schedule far in advance… so you wind up being the last to leave even if you don’t have to be. If you don’t mind that kind of stuff and it is worth it to you then it doesn’t matter. But those are things you may not think about.
Good luck whatever you choose!