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 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 lead in MSRP, offering an 82% better value in that specific category, it falls behind the Western Digital drive in the majority of technical metrics.

Users who prioritize maximum storage space for extensive libraries should choose the Western Digital WD Black SN850X 4TB to take advantage of its superior capacity. Conversely, the Samsung 970 EVO Plus 1TB is the appropriate selection for buyers who are primarily focused on the MSRP advantage. Selecting between these two drives depends entirely on whether your primary requirement is the significantly larger capacity of the Western Digital model or the cost-efficiency offered by the Samsung drive.