It doesn't matter how fast it backs up if it takes all night to restore. I loved Paragon Drive Backup 8.5 on my HP Pavilion XP PC. When they came out with a feature on the Personal edition that let you exclude files from the backup, I updated to 9.0.
I got rid of my XP machine and put it on my Vista 32 bit HP AMD Dual Core. Backups went smooth. Restores worked fine. Then I put the free 64 bit version on my HP AMD Vista64 Quad Core. Backups went smooth. Then I made the mistake of trying to use the "Backup Capsule" feature. Hosed my partition table. Then when I restored, because this PC has AMD Raid controller, even though the HD is just a Sata drive, the restore could only see it in "compatibility mode." A restore that ordinarily would take about an hour was an overnight job. Don't want to go through that again!!
A more meaningful test would be to take a bunch of machines available commonly at BestBuy or some other prevalent source, and do backup and Restore
operations and post which software succeeds at full speed on all HD controllers. Five more minutes to backup is ok with me if I don't have to spend 8 more hours doing the restore.