If my review of the first solid-state drive with 3D flash memory, the well-balanced, piqued your interest, you'll be happy to know there's a new player in town: the all-new MX300 drive from Crucial.
The MX300 is the second solid-state drive to use 3D flash memory, as opposed to the traditional, planar 2D flash memory. If you think of each memory cell as a person, then 3D is to 2D flash memory as high rises are to single-family homes. You can house a lot more people with the former, on the same patch of land.
The Crucial drive is quite different from Samsung's, however. For one thing, the MX300 is available in fewer capacities -- 275GB, 525GB, 750GB, 1TB and 2TB -- whereas the 850 Evo can be had from 120GB. (Originally, when first released, the MX300 was available in a single capacity of 750GB.)
Ironically, the Crucial drive is also missing a few crucial features, most notably the ability to customize overprovisioning (a predetermined amount of storage space that's put aside to better the drive's efficiency) and to boost speed by using a host computer's system memory as cache. Both perks are available on the Samsung. For this reason, in testing, the MX300, though faster than many budget SSDs and significantly faster than any hard drive, was clearly slower than the SSD 850 Evo.