There is a difference between a backup and an image. The two utilities you named create disk images - essentially a "snap shot" of the entire hd (or partition, whichever you choose). If you want to restore that image at some point, the entire system (or partition) will be as it was when you created the image. The internal tools create backups of certain files. Disk imaging also allows you to restore only certain files if you like. Personally, I wouldn't run a system without Acronis True Image and I've always said I think EVERYONE should use a disk imaging utility on a regular basis.