Micron is the second company to the 3D NAND flash milestone,with nowadays's release of the Crucial MX300 750GB Limited Edition. This follows on from two years ago when Samsung became the first manufacturer to ship SSDs with 3D NAND flash, the 850 Pro - a drive launched as a flagship tall end drive and remains the fastest consumer SATA drive nowadays. By contrast, and the Crucial MX300 is intended to be a mainstream affordable SSD based on 3D TLC NAND,making the MX300 more of a direct competitor to the 850 Evo.
Source: anandtech.com