There's even more to it that this:
LiveState Recovery is a backup product
Norton Ghost is a backup product (since version 9, based on the same engine as LSR)
Symantec Ghost Solution Suite is a deployment product (which can be good for backups too).
Symantec Ghost does things like post clone configuration, which are essential for deployment, but not required for backup. If you use Ghost to image 100 machines at a time, you don't actually want them to be indentical -- machine names, domain joining and network settings need to be configured automatically. The Ghost console also allows the deployment of applications, and the migration or preservation of user data across a imaging operation.