The Western Digital WD Black SN8100 4TB is the objective winner of this comparison, securing victory in five out of seven measured specifications. Its most significant performance advantage is its sequential write speed, which is 103% better than that of the competition. While the Samsung 990 Pro 2TB holds a 69% advantage in MSRP, the Western Digital WD Black SN8100 4TB dominates the technical metrics, making it the superior choice for users prioritizing raw storage throughput and capacity.

Users who require maximum sequential write performance and higher storage density should choose the Western Digital WD Black SN8100 4TB for their system. Conversely, the Samsung 990 Pro 2TB is the appropriate selection for budget-conscious builders who prioritize a more favorable MSRP over the higher capacity and write speeds offered by the alternative. Each drive serves a distinct need based on whether the user values cost efficiency or high-end sequential write capabilities.