The Western Digital WD Black SN850X 4TB is the objective winner of this comparison, securing more individual specification victories than its competitor. Its most significant advantage over the Kingston KC3000 2TB is its storage capacity, which is 100% higher. While both drives share several identical technical specifications, the increased space provided by the Western Digital option makes it the superior choice for users prioritizing maximum data volume in a single drive configuration.

Users who require the largest possible storage footprint should select the Western Digital WD Black SN850X 4TB to take advantage of its doubled capacity. Conversely, the Kingston KC3000 2TB is the better option for budget-conscious buyers, as it holds a 63% advantage in MSRP. Choosing between these two drives depends entirely on whether your primary requirement is the lower cost offered by the Kingston model or the expansive storage capacity provided by the Western Digital alternative.