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 its storage capacity, which is 100% greater than that of the alternative. By offering double the space, this drive provides a substantial increase in total data volume for users who require extensive room for their files, games, or professional applications compared to the smaller capacity offered by the Western Digital WD Black SN850X 2TB with Heatsink.

Users who prioritize maximum storage space should choose the Samsung 990 Pro 4TB to take advantage of its superior capacity. Conversely, the Western Digital WD Black SN850X 2TB with Heatsink is the better option for budget-conscious buyers, as it holds a 46% advantage in MSRP. Those who do not require the larger capacity of the Samsung drive can benefit from the cost efficiency provided by the Western Digital alternative while still maintaining a high-performance storage solution.