The Seagate Barracuda 2TB is the objective winner of this comparison, securing victory in three out of five measured specifications. While the Samsung 990 EVO Plus 1TB offers a significant performance edge, the most impactful advantage belongs to the Seagate Barracuda 2TB, which provides 100% more storage capacity than its competitor. This makes the Seagate drive the superior choice for users prioritizing total space over raw data transfer speeds.

Users who require maximum storage volume for large files or extensive media libraries should choose the Seagate Barracuda 2TB. Conversely, those who prioritize high-speed data access should select the Samsung 990 EVO Plus 1TB, as it delivers a 3663% improvement in sequential read performance. Selecting between these two components depends entirely on whether your primary requirement is the ability to store twice as much data or the ability to read data significantly faster.