University vs. Community College?

I know that at a community college that one needs to earn 60 credits before an AA/AS degree is earned. But I read on my schools website(USF) that one only needs either 42 or 45 credits to earn an AA/AS degree. But some students already have over that amount. Give his/her credits are mostly transfer credits from community college, but should that even matter? my main question is do the number of credits differ like this between community college and a university?