As I've downloaded but not installed the upgrade, I can't revisit that page. However I'm certain it said the same thing that it says on the apply upgrade screen which is "Added new feature." This is the same text that was shown when Vodafone sent me the upgrade to the latest version of Jellybean, so I suspect that updates from Vodafone always has this as a standard text. Note that there was NOT a section headed "Name".
I did go into the Vodafone shop and asked if there was anyway they could find out what it is. They said "No." I've tried the support website and it is impossible to use and useless.
I'm really hoping someone can help me with this, because now my phone keeps reminding me that I have an update to install.