What phyco said. If you plan to game at all, the AMD will do better (though still quite poor compared to having a dedicated graphics processor). The extra cores will only help with programs that are heavily threaded, but it doesn't sound like you'll be running anything of the sort, so I'd recommend the Intel one (as long as you're fine with 320Gb storage space, compared to the 500Gb on the other).
EDIT: On second thought, looking at some benchmarks, the AMD A8-4500M is actually ~2x faster than the Intel B960. Looks like the AMD should be better at most any task.
as my reference.
EDITx2: Ok, I need to double-double check more often. http://www.notebookcheck.net
shows that the Pentium is in fact faster at most tasks, but by a small margin. Not sure why the A8-4500M is rated so highly on the other site...must be including video performance.