I am cloning 4 drives from 1 QNAP to 4 new larger drives for a new QNAP, each on a different imaging system.
DDI4 - 94MB/second
DDI4 with ATA extender - 114MB/second
RapidSpar - 154MB/second
Startech SATADUP11 - 170MB/second
As a data recovery professional, I'd never use the Startech imager for an actual data recovery project from a failing hard drive. In this case, all the drives are healthy and are simply being cloned for the upgrade.