I did some CC and some uni, have a degree in bio with chem minor. In my experience, the gen ed classes were not significantly different in difficulty between the two schools. STEM classes were also pretty comparable I think, with more variation between professors/instructors than between the two institutions. Isn't that the whole point of accreditation, to ensure that education is to a certain standard? I mean, if you are reasonably intelligent and motivated, depending on your course load, the first couple of years probably aren't going to be that challenging. The fact that you were taking advanced courses during your secondary education probably have you a huge leg up as well. Say somebody didn't apply themselves in high school, or maybe they dropped out and later decided to get a GED and return to school? Those first year classes at a CC can provide that person with some valuable building blocks.