Well that isn’t completely accurate, there is a big difference in the power of the processors, the i7 hexacore being much better, the price is what gives the advantage to the AMD. According to pc mags and sites like tom’s hardware the Intel cpu is 3x the price but isn’t 3x the performance. But the i7 is definitely better (6 cores, 12 threads). I have an i5 and love it, it seems to be the best bang for your buck at the moment. Mine is oc’ed to 3.2ghz currently, and according to benchmarks the i5 competes with i7’s with gaming framerates. For rendering though the advantage goes to the i7 for the hyperthreading. Your best bet is an i7, over a hexacore AMD cpu. Although an i5 PC with a good amount of ram (6-8 gigs) would be a solid rendering machine.
Take a look at this to compare cpu’s in Blender: http://www.eofw.org/bench/
The i5 is in the top ten, and costs $200 bucks. It’s a no-brainer for me.
Actually I was looking at the list and saw a Celeron in the top spot with a .01 sec rendering time, looks like some goofs have messed uploaded bad info. So that list probably isn’t credible right now. But if the AMD Sixcore rendering times are accurate then that is probably the best rendering cpu out right now for the price. If you’re looking at the list any of the rendering times under a second probably aren’t real, so start at #7 for accurate ranking.
Sorry for the long post, computers are kind of my thing