The Western Digital WD Black SN8100 2TB is the objective winner of this comparison, securing victories in five out of seven measured specifications. Its most significant performance advantage is its sequential write speed, which is 122% better than the alternative. This substantial lead in write capability establishes it as the superior option for users prioritizing raw data throughput and high-capacity storage performance in their system builds.

Choose the Western Digital WD Black SN8100 2TB if your primary requirement is maximum sequential write speed and increased storage capacity. Conversely, select the Western Digital WD Black SN850X 1TB if your main priority is the MSRP, where it maintains a 71% advantage over the larger drive. These distinct benefits allow you to balance your specific performance needs against the cost-efficiency of the smaller capacity model.