Out of those two choices I would go with the FX 6300 as well. However, having both AMD and FX rigs I can tell you that Planetside 2 favors intel procs more than AMD. My AMD rig has some stutter online compared to the i5.
Well I know that Game Update 02 that was released yesterday basically broke the game for Intel and AMD users alike. Studdering, and FPS drops are the main culprit. But yeah, the 6300 looks pretty promising.