Ghost 15 $69.99 vs $49.99 Difference?

I am looking to get Ghost 15.0 since I changed computers and went from Windows XP to Windows 7. In looking at the online store, Norton Ghost shows me a price of $69.99 yet if I click on "upgrade" I get to another page that shows me Ghost 15.0 for $49.99.

 

Now I had Ghost 14.0 but heard it wasn't completely compatible with 7 so haven't tried to install it. Got some good advice to upgrade.

 

Ok, so I might choose the somewhat cheaper price that I found via the "upgrade" link but looking at system requirements does not show it Windows 7 and (as it happens) one of the links in the main panel leads to a discussion of what Ghost 14 needs.

 

So which one? The $69.99 one that shows it is compatible with 7 or the $49.99 one that does not. Each panel for these shows or states it is Ghost 15.  I don't want to spend more than I need to in getting my Ghost backup again but I don't want to get the "wrong" one if I go with the cheaper one.

 

Thanks,

Russell