Cloning the drive will take a snapshot of everything that is on the drive,therefore enabling you to transfer the clone to another drive and away you go if the current drive fails.
Image your drive:
Well that depends on what you decide to image.
Basically it can work the same as cloning,but some only take an image of there files/docs pics etc for backup,though you can image the whole drive and possible recovery partition.
Never used the Seagate tools but have used Acronis that does basically the same thing.
Partition Logic is free click here
Ranish partition manager is free also
Most of the rest out there,need payment.