The Samsung 9100 Pro 4TB is the objective winner of this comparison, securing victory 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 room for data, the Samsung 9100 Pro 4TB establishes itself as the superior option for users prioritizing high-volume storage needs within a single drive configuration.

Users who require extensive space for large libraries or professional workloads should select the Samsung 9100 Pro 4TB to leverage its massive capacity advantage. Conversely, those operating under strict budget constraints should choose the Samsung 990 Pro 1TB, as it holds a 77% advantage in MSRP. This smaller drive remains the logical choice for individuals who prioritize a lower initial cost over the expansive storage footprint provided by the larger model.