Caldigit vs Apple Raid Cards

http://www.barefeats.com/hard105.html

AND THE WINNER IS...
The CalDigit RAID card's maximum transfer rate is higher than the Apple Pro RAID, though the gap shrinks as you fill up the RAID set (See Disktester graphs). Though we tested four internal drives, the CalDigit RAID card distinquishes itself by support up to 12 external drives using three mini-SAS connectors.

KEY FEATURES
1. You can connect the factory Mac Pro mini-SAS connector to the CalDigit RAID card without the need for an adapter or extender.
2. It supports RAID 0, 1, 5, 6, 50, 60, and JBOD (more modes that the Apple Pro RAID card).
3. CaDigit has developed what they call Active Sustained Transfer Technology (ASTT) which optimizes the best transfer size and timing between the RAID controller cache and the host machine.
4. You can expand the size and level of the RAID set without having to reformat or lose data.*
5. It boots Mac OS X (as well as Windows and Linux). It also works with Boot Camp partitions.
6. Battery backup is an option.