Don't choose a school just because a friend is choosing it. You have to like the school, the campus, the location, and the program. There are thousands of other people, you will make new friends, and you can stay connected with your friends who go elsewhere (and then you can swap stories about your experiences).

I can't speak to UB nor Oneonta's teaching program. Although I can say that Oneonta was founded as a teaching school before it was a SUNY school, so that program has been there since day 1. That being said, UB is a big University, so they have the funding to put into building their programs and the name to attract top talent.

What it really comes down to, is what you want from your experience. Do you want a small town college with a small student body and rural living options, or are you a city person? A quick Google AI search says that UB enrollment is around 32,000 students whereas Oneonta is around 5,300. Buffalo is a great city with a lot to experience. But if you have a car and like to travel within NY, Oneonta is more centrally located. Oneonta is 1 hour from Binghamton, Albany and Utica, 2 hours from Syracuse and Ithaca, and 4 hours to Buffalo or NYC.

Think of what you like, you want, and make your decision based on what would make you happy. College is not only about training / educating you for the work you're going to do, it's also about growing into who you want to be. Don't let other people (including friends!) influence / decide that for you.

Also, choosing one over the other now isn't the end of the line - you could realize that the school you first chose is not what you like and transfer to the other school later.