The new x4 860k is based on the steamroller, a nice upgrade over the piledriver based x4 760k. 4 cores overclockable up to 4.4 GHz.
A i3-4130 runs at 3.4, and has hyperthreading. It can not be overclocked.
A hyperthread uses residual capability of the main core, and I estimate that it is worth perhaps 1/3 of a real core.
That gives you 3.4 for each full core + 1.0 or so for each hyperthread.
You get that only if you can fully utilize all 4 threads.
Two cores plus hyperthreading and 4 cores.....
The best to pick will be determined by how many cores your normal workload can actually use.
Most apps and games are single threaded, so faster, more effective cores are a priority.
AMD cores are simply not as strong as intel, perhaps 30%...