FX 8350 vs FX 8370

hello guys

currently I have a FX 6300 CPU installed on a Asus Sabertooth 990FX R3.0

and I was looking around to upgrade my CPU to max out my motherboard without burn it

so there are any differences between the FX 8350 vs the FX 8370 ???

and where I can find a store where I can actually buy a NEW FX CPU without end to get a refurbished or used one ???

thanks ...!!!