From: http://ssd.userbenchmark.com/Compare/Samsung-960-Evo-NVMe-PCIe-M2-1TB-vs-Toshiba-OCZ-RD400-NVMe-PCIe-M2-256GB/m211052vsm142093

Solid State Drive Rankings (Price vs Performance)
August 2017 SSD Rankings.
Welcome to our consumer SSD comparison. We calculate effective speed based on real world performance 
then adjust by cost per GB to yield a value for money rating. Calculated values don't always tell the 
whole picture so we check them against thousands of individual user ratings. The customizable table 
below combines these factors and more to bring you the definitive list of top SSDs. Share your opinion by voting. [SSDrivePro]