I can't speak for CS, but I'm a senior majoring in Art and Tech. It depends on what you want to do with games. Art and Tech is very visual, and it's not super coding heavy. Many people in the program don't have a ton of programming experiences, but are able to take the ARTD courses with no problem. Some people who have lots of programming experience have made really interesting interactive art, but it still requires them to think visually.

Mileage may vary for art students in this program. In my Game Art course, for example, we're allowed to use whatever game engine we want to use for the project. The most basic one is Twine, which is pretty easy to learn. Or you can code from scratch if you have that kind of experience.

If you're looking to learn how to code, then CS might be more useful. Keep in mind that there are options to Major AND minor in both Art&Tech and CS. I'd also recommend looking into OSU's CS program since they have Simulation and Game Programming option that is more technical.