The Samsung 9100 Pro 1TB is the objective winner of this comparison, securing victories in four out of seven evaluated specifications. Its most significant advantage is a 97% improvement in sequential read speeds compared to the alternative. This performance lead makes it the superior choice for tasks that prioritize rapid data access and high-speed throughput, as it outperforms the Samsung 990 Pro 4TB across the majority of the measured technical categories.

Users who require maximum storage space should select the Samsung 990 Pro 4TB, which offers a 300% capacity advantage over the smaller drive. Conversely, those who prioritize raw speed and efficiency should opt for the Samsung 9100 Pro 1TB. By choosing based on these specific strengths, users can align their storage hardware with either the high-volume requirements of large file libraries or the high-performance demands of intensive data operations.