The Western Digital WD Black SN8100 4TB is the objective winner of this comparison, securing five out of seven total specifications. Its most significant performance advantage is its sequential write speed, which is 122% better than that of the Samsung 990 EVO Plus 2TB. While the Samsung 990 EVO Plus 2TB holds a 69% advantage in MSRP, the Western Digital WD Black SN8100 4TB dominates the technical metrics across the majority of the evaluated categories.

Users who prioritize high-capacity storage and superior sequential write performance should choose the Western Digital WD Black SN8100 4TB for their system. Conversely, the Samsung 990 EVO Plus 2TB is the better option for budget-conscious buyers who value a lower MSRP over the raw speed and capacity advantages offered by the alternative. Selecting between these two drives depends entirely on whether your primary requirement is cost savings or maximum write throughput.