If you have CS6, CC and CC 2014 installed you will not get the new Features of ACR in CS6 you will have them in CC and CC 2014.
I have CS 6 installed as well as a subscription to Photoshop CC, but I don't use CS 6. I'm just keeping it around in case Adobe jumps the CC subscription price out of sight. I was using Photoshop CC and Bridge. I always pass my .nef and .jpg files through ACR first. Sometimes the Radial Filter button is there and sometimes it is not.