The Samsung 9100 Pro 8TB is the objective winner of this comparison, securing more individual specification victories than its counterpart. While both drives share identical performance across most metrics, the Samsung 9100 Pro 8TB offers the most impactful advantage by providing 100% more storage capacity than the smaller model. This significant increase in available space makes it the superior choice for users who prioritize maximum data density for their storage requirements.

Choose the Samsung 9100 Pro 4TB if your primary objective is cost efficiency, as it holds a 44% advantage in MSRP. This model is the logical selection for budget-conscious users who do not require the expanded footprint of the larger drive. Conversely, select the Samsung 9100 Pro 8TB if your workflow demands the highest possible capacity, as it effectively doubles the storage potential available in the 4TB version.