As far as I can tell, there is no difference between the two versions of the software, just that Apple is willing to sell the software cheaper if you are indeed in education. You don't specifically say whether you are a student or not, but if you are, go ahead and purchase the education version because you are entitled to it.
I think the Edu. versions of softwear don't let you upgrade you would have to either 1) buy a new version that isn't acidemic so you can upgrade for a cheeper price or 2.) just keep on buying the edu versions of them which i think will be more exspensive in the long run. Im not possitive about this
Check out Academic Superstore. They have some killer deals on software and some decent discounts on hardware too. Only catch is from what I hear you have to provide proof of eligibility, i.e. student schedule, photo student/teacher ID, paystub etc... but you're not trying to cheat are you.
academic software, all of it AFAIK, has a clause or whatever the term is in it that basically says you can't use it for a commercial purpose. like if you use academic FCP for a for-profit project you're in violation of the EULA. that's one of the reasons they can charge incredibly much less for it.