I would not recommend either one. I suggest getting an X99 system with the 5960X and 64GB of ram or atleast 32GB of ram. The faster the ram the better the performance for any GPU acceleration.
Neither configuration would be ideal for this: The Xeon configuration's CPU clock speed is far too low to do much good while the i7-4790(K) configuration has only four physical cores.
Furthermore, Ray-Tracer 3D acceleration is now EOL (End-Of-Life): Adobe is no longer developing this type of 3D GPU acceleration any further. It is going with something else for 3D rendering, which currently may not be GPU-accelerated at all.
Thirdly, how much is the most are you willing to spend? You see, what Eric suggested may be priced far higher than your maximum budget permits, judging by the current prices for the RAM, CPU and motherboard.