I have read that USB 3 is faster than SATA 6, but using HD Tune Pro Sata 6 is faster than USB 3. Below are read benchmarks and the 2TB HD's plugged into a Sata 6 port is faster by far than a 2TB USB 3 WM My Passport plugged into a USB 3 port.
LaCie d2 Quadra 2TB eSATA HD (this is also USB 3.0, but I am using it as eSATA)
http://www.newegg.com/Product/Product.aspx?Item=9SIA1J20UC1358

WD Black 2TB 7200 RPM 64MB cashe STAT 6 HD
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136792

WD 2TB USB 3.0 My Passport HD
http://www.newegg.com/Product/Product.aspx?Item=N82E16822236187

According to HD Tune Pro the USB 3 HD plugged into a USB 3 port is a lot slower than HD's plugged into SATA 6 ports, is what I am seeing correct?
LaCie d2 Quadra 2TB eSATA HD (this is also USB 3.0, but I am using it as eSATA)
http://www.newegg.com/Product/Product.aspx?Item=9SIA1J20UC1358
WD Black 2TB 7200 RPM 64MB cashe STAT 6 HD
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136792
WD 2TB USB 3.0 My Passport HD
http://www.newegg.com/Product/Product.aspx?Item=N82E16822236187
According to HD Tune Pro the USB 3 HD plugged into a USB 3 port is a lot slower than HD's plugged into SATA 6 ports, is what I am seeing correct?











. However I did find this review: