I have a Norton 360 license, and a NIS license which one should I use - any suggestions

I had Norton 360 on my old PC, and NIS on my new PC.  Norton 360 automatically renewed, so now I have active licenses for both.  Which one should I use on my new PC.  I liked the back up features of Norton 360, and I have Norton utilities in addition to NIS.  I am running Windows 7.