The U.S. and Europe are two of the most popular destinations for international students to study abroad. The U.S. is one country with 50 states, and Europe is one continent with 44 countries; both vastly differ regarding educational systems.
U.S. universities are known to be on the more expensive side. The school spirit on campus is very strong as all universities have a mascot and an active community that keeps the students on their toes with several activities. The U.S. educational system also believes in a comprehensive academic plan where students must take a set of general education classes in addition to the major-related courses in the student's choice of program. These general education classes would include introductory courses in English, math, psychology, natural sciences, fine arts, humanities, and social sciences, etc.; all these additional classes are a big reason why a Bachelor's degree in the U.S. would be four years vs. the counterparts in Europe being three years.
In Europe, universities are highly funded by the government and follow a socialist approach. Education is open to everyone for free or for a very minimal cost. Some universities also offer free education to international students. Others have a tuition fee of 1/5th of what it would cost to study at a U.S. university. Education in Europe is straightforward; if you want to get a degree in engineering, you study engineering, math, physics, etc., and finish your degree in three years. There are no general education requirements and less flexibility in choosing your classes than in U.S. universities.
Both of them have their pros and cons. So as a student, you must decide which type of society you want to live and thrive in. Universities in both places are some of the best in the world, and you will surely advance your educational journey by deciding to go to either.