The Samsung 9100 Pro 4TB is the objective winner, securing victories in five out of seven comparable specifications. Its most impactful advantage is its capacity, which is 100% better than the alternative. By offering double the storage space, this drive provides a significant lead in total volume for users requiring extensive data retention. While the Samsung 990 Pro 2TB with Heatsink holds its own in specific areas, it falls behind in the majority of measured categories.

Choose the Samsung 9100 Pro 4TB if your primary requirement is maximum storage capacity for large files or extensive libraries. Conversely, opt for the Samsung 990 Pro 2TB with Heatsink if your priority is the MSRP, which is 54% better than the larger model. This makes the latter a more suitable choice for budget-conscious users who do not need the additional space provided by the higher-capacity drive.