The APU is most likely better for the graphics/gaming work but the Intel® Atom™ n2600 will give you better battery life. If you are buying a netbook you need to understand battery life is what it is all about.
For most people I would advise that you get a refurbished laptop that uses an Intel® Core™ 2 Duo processor as a better value for your money. Maybe something like this http://www.newegg.com/Product/Product.aspx?Item=N82E16834200139
Intel Enthusiast Team