There really are differences though, and they often go unnoticed because we've come to take them for granted:
You have a lot more freedom to do what you want in college
Mom and Pop may certainly be unhappy about you coming home (however sober you are) at 3AM in the morning or the disproportionate amount of time that you spend going around the city and beyond with someone, but at this point in life your parents should more or less have realised that there is only so much they could do. Expect to see ever greater amounts of trust and an increasingly hands-off approach from your folks. Having a date as far north as the misty rolling hills of Batanes or staying meeting your partner's parents won't raise as many eyebrows anymore. This being said though, they will probably still be curious about what's going on in your life and will constantly ask questions.
There's usually a wider pool
Unlike in high school where pretty much everyone knows everyone, in college, pretty much everyone does not know everyone beyond a mere acquaintance. Classes tend to be less personally engaging and its hard to meet people outside of your major if you're the sort who goes to college only to go to class. While this may not seem like such a good thing if you're looking for a date, it actually is, especially if you're savvy enough to take advantage of the vastly greater amount of people you can meet in college if you tried. The thing is, people outside of your usual routines are actually the ones you should consider to be "dateable" instead of the ones you expect to see on a consistent basis for the rest of your college career. It makes friendships and academics less awkward while ensuring that break-ups are not going have consistent reminders coming up your face in your classes and hangouts.
What you do to spend time is not the same
In high school, perhaps the usual movie dates or dinner would likely have been fine. That was the expectation, and it was only puppy love (mostly) really, what else could you do? In college, things tend to change for many people, not because going to the movies or doing a dinner are "too cool" or "high school-ish" for them, but simply because the dynamics of college dating is a different thing. A lot of times, just having personal time for both of you, perhaps watching something on Netflix or an intimate chat in a calm bar or restaurant is what's ideal. Tastes and expectations just change, and having quality time spent together as opposed to the almost-formalities of dinner or the movies that sort of grow on you.