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 capacity, which is 300% greater than that of the alternative. This substantial increase in storage space makes the Samsung 9100 Pro 4TB the superior choice for users who prioritize high-volume data retention and require extensive room for large files, applications, or media libraries over other considerations.

The Silicon Power UD90 1TB is the recommended option for budget-conscious users, as it holds a 91% advantage in MSRP. While it offers less storage capacity, the Silicon Power UD90 1TB remains the logical selection for those who need a functional drive while minimizing initial expenditure. Choose the Samsung 9100 Pro 4TB for maximum storage density, or select the Silicon Power UD90 1TB if your primary goal is to secure the most favorable MSRP.