Norton 360 is a single license (one installation) and Deluxe includes five licenses. The Deluxe version comes with fifty GB of online backup space instead of 10GB as with the single license. In addition, it comes with a few minor bells and whistles I do not consider. The price isn’t five times the price, but it’s more than $100 per year, rather than around $80 for a single license, therefore Norton gives an enticing volume discount. Apart from that, they’re identical products.