The Samsung 990 Pro 4TB is the objective winner of this comparison, securing more individual specification victories than its competitor. Its most significant advantage is a 20% better MSRP compared to the Western Digital WD Black SN850X 4TB with Heatsink. By outperforming the alternative across the measured categories while maintaining this superior pricing structure, the Samsung 990 Pro 4TB establishes itself as the more efficient choice for users prioritizing value based on the provided specifications.

Users who prioritize the most favorable MSRP should select the Samsung 990 Pro 4TB, as it offers a clear advantage in that specific area. Conversely, the Western Digital WD Black SN850X 4TB with Heatsink remains a viable alternative for those who prefer its specific design, as it ties the Samsung 990 Pro 4TB in the majority of the evaluated technical fields. Both drives provide identical performance in the four tied categories, making the decision dependent on your preference for the Samsung pricing advantage.