Norton 360 has some additional features over Internet security like data backup, tuneup etc. But this features are available in free third party apps. And I personally dont feel that Norton 360 is worth its price tag. It maybe for some, but not for me.
NIS2012 has served me really well for last one year without any issues at all. So from my side I rate it 9/10. The most important part I liked about NIS is the scan time. Its really fast and effective.
we are going to buy a 10 users pack, so maximum cost to each user will be Rs. 500