You should look at the apps you or someone need, I7 3770K is more powerful in most single threaded apps, not all apps.
In this case, I would stick with Vray renderer, and if you want a review you can search about it if you dont impress with my results:
http://www.behardware.com/articles/880-7/amd-fx-8350-review-is-amd-back.html
Vray 2: