In the states it’s the same. Abroad a University is more “prestigious”.
I’ve taken to calling it University in the states, ‘cause I like how that sounds.
“You go to University?”
There is a difference. A college offers various degrees but is a self-contained institution. A university is a collection of colleges, each of which offers a degree in its specific field.
Tufts University includes The College of Arts and Sciences, The Engineering School, The Veterinary School, and The Medical School. When referring to the university, you are talking about all of the schools.