+3 - from the sheer power view...
But be sure to have a good case and adequate cooling, as Vray will tax your CPU to the max, ad that FX is a 125W beast.
Well... If all other things are equal, the i7 3770 beats the FX 8350 75-80s : 100s. And, as we all know, the HT adds around 30-40% computing power /depends on a scenario/... So the score for the i5 should be kinda tied at 100-105s / 100s with a slight favour for the FX.
Cons> You will need to invest in better cooling.
Pros> You can overclock the hell from the FX /something you can't do without a intel K processor/.
Also, there is always Vray RT to consider since it uses GPU and that thing is many times faster than any CPU out there