The Samsung 9100 Pro 4TB is the objective winner of this comparison, securing victories in six out of seven evaluated specifications. Its most significant advantage is its storage capacity, which is 300% greater than that of the alternative. By offering substantially more room for data, this drive establishes itself as the superior option for users prioritizing high-volume storage needs over other considerations.

The Samsung 9100 Pro 4TB is the ideal choice for power users or professionals who require extensive space for large files and demanding applications. Conversely, the Silicon Power UD90 1TB is the better selection for budget-conscious buyers, as it holds a 91% advantage in MSRP. Those who do not require maximum capacity should opt for the Silicon Power UD90 1TB to take advantage of its more favorable pricing.