The Samsung 990 Pro 4TB is the objective winner of this comparison, securing more individual specification victories than the Samsung 980 Pro 2TB. While both drives share two tied specifications, the 990 Pro 4TB offers the most significant advantage in this matchup by providing 100% more storage capacity. Conversely, the 980 Pro 2TB maintains its primary competitive edge through a 42% better MSRP, making it the more cost-effective option for those prioritizing initial acquisition savings.

Users who require maximum storage space for large libraries or professional workloads should select the Samsung 990 Pro 4TB to take advantage of its superior capacity. This drive is the clear choice for high-demand environments where total volume is the priority. Alternatively, the Samsung 980 Pro 2TB is the better option for budget-conscious buyers who prefer a lower MSRP and do not require the expanded storage footprint offered by the larger model.