The Samsung 990 Pro 2TB is the objective winner of this comparison, securing more individual specification victories than its counterpart. While both drives share identical performance characteristics across four key metrics, the 2TB model provides the most significant advantage by offering 100% more storage capacity. Conversely, the Samsung 990 Pro 1TB holds a notable lead in affordability, boasting a 35% better MSRP compared to the higher-capacity version.

Users who prioritize maximum storage space for large libraries or extensive file collections should choose the Samsung 990 Pro 2TB to take advantage of its doubled capacity. If your primary goal is to minimize initial expenditure while maintaining the same performance standards, the Samsung 990 Pro 1TB is the better selection due to its superior MSRP. Both options provide consistent technical specifications, allowing you to base your final decision strictly on your specific capacity needs and budget constraints.