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 technical advantage is its sequential write speed, which outperforms the Samsung 990 Pro 2TB by 103 percent. While the Samsung 990 Pro 2TB maintains a lead in MSRP, offering a 69 percent better value in that specific category, the superior write performance of the Western Digital drive establishes it as the overall leader.

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