On page 1 (PDF page 9) of the HP Spectre Folio's maintenance manual, it says that the 1TB and 2TB SSD options are "Super Speed" SSDs. http://h10032.www1.hp.com/ctg/Manual/c06161497 Is there an actual difference in speed between the 512GB and 1TB version? Enough to warrant an upgrade? And do they take more power? Or are they more energy efficient because (i.e. do they use a similar amount of power when active...but complete their work quicker)?