Can someone help me understand the differences in these hard drives. i'm in the market for my Mac Pro. I like Seagate, doesn't have to be, but my question is with these, they are different prices. i don't understand what the differences are. Can anyone help me? thanks.
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010150014+50001305+1035915133+103530113+1035307886&name=500GB
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010150014+50001305+1035915133+103530113+1035307886&name=500GB