What is the difference between this two: My Passport http://www.wdc.com/en/products/products.aspx?id=640 My Passport Essential http://www.wdc.com/en/products/products.aspx?id=440 There is no difference in price at my supplier, so I just want to know which one to pickup? And also another question. Recently I bought a Buffalo MiniStation Extreme 1TB. Really nice portable drive and quite fast also! But the drive within is 5400 RPM, so I've been thinking: Can I get higher speeds if I pickup a drive with USB3 and 7200 RPM? If yes: Has somebody tried the Samsung S2 Portable Drive USB 3.0 (7200 RPM)? Is it a better drive and should I get that one instead?