The Samsung 990 Pro 4TB is the objective winner of this comparison, securing victory in four out of seven evaluated specifications. Its most impactful advantage is its storage capacity, which is 300% greater than that of the Samsung 980 Pro 1TB. While the latter remains competitive in two categories, the former dominates the technical landscape by offering significantly more space for data and files, establishing itself as the superior option for high-capacity storage requirements.

Users who prioritize maximum storage volume should choose the Samsung 990 Pro 4TB to take advantage of its superior capacity. Conversely, the Samsung 980 Pro 1TB is the better choice for budget-conscious buyers, as it holds a 62% advantage in MSRP. Selecting between these two components depends entirely on whether your primary goal is to secure the largest possible drive or to minimize your initial investment cost.