It also kind of depends on the school you're at and your interests.
I had research and studying abroad experience. However, my application was more catered toward underserved, Spanish-speaking populations, so my study abroad experience in a Spanish-speaking country was of much greater importance in my interview.
Now, I can't be sure that they didn't just look at my research, make a check mark, and then focus on other things. Still, people get in without research (though it is less common).
I would be safe and get some research if possible. Some baseline is pretty much necessary, and study abroad will not make up for research. However, if there is a choice between studying abroad versus being a complete research stud, you might consider what your goals are.