SATA RAIDs are almost all set up with the Apple Disk Utility as either RAID 0 or RAID 1.
The product I am describing sets up the RAID on the card, so that the entire RAID volume appears to MacOS as one disk. When ever the next time you update your version of OS X and loose the RAID set, you would understand the difference.
It also is one of possibly two products that allow you to set up a RAID 5 on card and this setup is not available for SATA RAID’s in most instances.
You should purchase whatever solution you feel most comfortable with, so I was just offering one that others are using successfully.