The Samsung 990 Pro 1TB is the objective winner of this comparison, securing a lead in two out of seven evaluated specifications. Its most impactful advantage is a sequential write speed that is 10% faster than the competition. While the two drives share identical performance metrics across five other categories, the Samsung 990 Pro 1TB provides a measurable edge in write-heavy operations, establishing it as the superior choice based on the provided technical data.

Users who prioritize maximum sequential write performance should select the Samsung 990 Pro 1TB for their storage needs. Conversely, the Western Digital WD Black SN850X 1TB with Heatsink remains a viable alternative for those who prefer its specific design, as it matches the performance of the Samsung drive in every other measured specification. Both components offer equivalent capabilities in the majority of tested areas, making the decision dependent on whether the 10% write advantage is necessary for your workload.