The Western Digital WD Black SN850X 4TB is the objective winner of this comparison, securing victories in three out of five evaluated specifications. Its most significant technical advantage is its sequential read speed, which outperforms the Seagate Barracuda 2TB by 3742 percent. While the Seagate Barracuda 2TB maintains a lead in MSRP with an 86 percent advantage, the superior performance metrics of the Western Digital drive establish it as the more capable hardware option.

Users prioritizing raw speed and maximum storage capacity should select the Western Digital WD Black SN850X 4TB for their system. This drive is best suited for high-performance tasks that benefit from its massive sequential read advantage. Conversely, the Seagate Barracuda 2TB is the appropriate choice for budget-conscious buyers who prioritize a lower MSRP over the performance and capacity gains offered by the alternative.