The Jaz has a reputation for speed but the Orb is faster. You do the math. I hear many stories of unreliability regarding both the Orb and Jaz. My own experience has been good with the Orb and bad with the Jaz. Let's say I would not rely on either drive as the only means of backup.
Sustained Rate is displayed in the charts.
Peak rates can be impressive but do not reflect typical drive performance.