The Western Digital WD Black SN850X 4TB is the objective winner of this comparison, securing five out of seven total specification categories. Its most significant advantage over the competition is its storage capacity, which is 300% greater than that of the alternative. While the Samsung 970 EVO Plus 1TB holds a 82% advantage in MSRP, the superior capacity and overall performance metrics make the Western Digital drive the more capable hardware choice for most modern storage requirements.

Users who prioritize maximum storage space for large libraries or high-density data should select the Western Digital WD Black SN850X 4TB to take advantage of its significantly higher capacity. Conversely, the Samsung 970 EVO Plus 1TB is the appropriate choice for budget-conscious buyers who prioritize a lower MSRP over the expanded storage volume and performance specifications offered by the larger drive. Choose based on whether your primary need is total capacity or initial cost efficiency.