The Samsung 9100 Pro 4TB is the objective winner of this comparison, securing victories in five out of seven evaluated specifications. Its most significant advantage over the competition is its storage capacity, which is 300% greater than that of the alternative. By offering substantially more space for files and applications, this drive provides a clear technical lead for users prioritizing high-volume data retention and long-term storage scalability within their systems.

The Western Digital WD Black SN850X 1TB is the preferred choice for budget-conscious users, as it holds an 83% advantage in MSRP. Those who require a smaller storage footprint and prioritize cost efficiency should select this drive. Conversely, the Samsung 9100 Pro 4TB is the superior option for power users and professionals who need the maximum available capacity to support extensive libraries and demanding workloads, despite the higher initial investment required for the larger drive.