The Western Digital WD Black SN850X 4TB is the objective winner of this comparison, securing victory in five out of seven measured specifications. Its most impactful advantage is a sequential read speed that is 109% faster than the alternative. While the Samsung 970 EVO Plus 2TB remains competitive in one category and ties in another, it falls behind the superior performance metrics offered by the Western Digital drive across the majority of the tested fields.

Choose the Western Digital WD Black SN850X 4TB if you require the highest sequential read speeds and maximum storage capacity for your system. Conversely, the Samsung 970 EVO Plus 2TB is the better option for users prioritizing a lower MSRP, as it holds a 68% advantage in that specific metric. Select the drive that best aligns with your primary need for either raw performance or a more favorable initial cost.