There has always been some level of lottery involved when buying an SSD-equipped Mac. The first Mac to start the lottery was the 2010 MacBook Air, which initially used Toshiba's SSDs but later it was found that some units were shipping Samsung SSD 470 based drives. Up until last year Apple kept using the same Toshiba and Samsung SSDs; the 2012 refresh finally brought SATA 6Gbps SSDs to Macs and, of course, another round of lottery too. The 2012 MacBook Air kept using drives from both Toshiba and Samsung, albeit both were newer generation (Toshiba's is SF-2281 based, Samsung is PM830). The rMBP, however, used only SSDs from Samsung, and the 256GB and 512GB SSDs in the MacBook Air were all Samsung made as...