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 alternative is its storage capacity, which is 300% better. By offering substantially more room for data, this drive provides a clear technical lead in overall hardware capability compared to the Samsung 980 Pro 1TB, which only outperformed its counterpart in a single measured specification.

Users who prioritize maximum storage space for large libraries or extensive file management should select the Samsung 9100 Pro 4TB to leverage its superior capacity. Conversely, those who are strictly focused on the initial purchase cost should choose the Samsung 980 Pro 1TB, as it holds a 73% advantage in MSRP. Your final decision should depend on whether you value the expansive storage volume of the larger drive or the lower cost of the smaller unit.