Well, it really depends. For editing & what-not, the 6300 will prevail because of it's 2 extra cores. The FX-6300 also is newer, runs off of a 32nm process instead of 45nm. You might also see a slight gain in performance in games.
But some people will tell you different. Me being me, I'd get the 6300 just because it's newer But really, both (or all three) are good processors. You get what you want to.