Hello, I plan to buy two portable drives of at least 2TB. One to backup my Mac OS partition and the other to backup Windows. I have a Lacie Mobile Porsche 2TB USB 3.0 hard drive. It is very good. How is the Seagate 2TB Backup Plus Slim Portable HD and the Western Digital My Passport Ultra 2TB compared with the Lacie drive I have? It seems that there are two versions of Western Digital My Passport Ultra. One with this name and the other with a NEW in the title. Am I right?