How difficult is a four year university?

It depends on where you are currently at and where you are going (as well as what kind of classes you are taking). Some community colleges are incredibly easy (as are some universities) and some are extremely challenging. Also if you are a Elementary Education major you will have a far different experience than if you are a Physics major.

Upper level classes in a 4-year university tend to get much more difficult, as only the people majoring in that subject tend to take those classes. You tend to get far less attention in a 4-year and don't see the same people around as much (depending on the size of your program and whether you are only taking classes in your major).

Since the size and quality of community colleges and 4-year schools both vary tremendously it is very hard to compare.

The classes at the four year university will basically pick up where the community college classes left off. The further you go the more difficult the courses are and the more work that is required to satisfy the requirements for those courses. A very obvious difference between the community college and the university will be the class size and the attention the professors will be able to or want to give each individual student. It is very easy for some students to become "lost" at a four year college because they are used to the more personal attention they had while in high school or community college. Expect some classes at the university to have as many as 400 to 600 people in lecture hall. If you don't get there early you don't get a seat. Anyone can be successful at the university, but it will take a lot of individual effort on your part. Good luck.

If money is not an issue then do all 4 at the same school. To save money do two and two. It is much cheaper however make sure that you check each class that you take and make sure that it will transfer to the school you are transferring to. You can work with a counselor at the schools to do this. If you do not, classes may not transfer and you may need to repeat a few classes. The difference at a 4 year is the social situation is different. 2 Year college tend to be commuter student and there is not much socializing. A 4 year is different. It is more of a total experience. If you are still living at home and you can afford the 4 year I would recommend it and live on campus! Do not feel you have to join a sorority though. You can still have lots of fun without joining one (Although I did join Phi Beta Kappa, but that is an honors fraternity so it does not count!) Good Luck in School! Have you chosen a major yet? That may also help you decide since you can possibly take more classes in your major for your first two year electives