The Samsung 9100 Pro 4TB is the objective winner of this comparison, securing more category victories across the evaluated specifications. Its most significant advantage over the competition is its storage capacity, which is 100% greater than that of the alternative. By offering double the space, this drive provides a substantial physical footprint advantage that defines its position as the superior option for users requiring extensive data retention capabilities.

Users who prioritize maximum storage volume for large libraries or professional workflows should select the Samsung 9100 Pro 4TB to leverage its superior capacity. Conversely, the SK Hynix Platinum P51 2TB is the better choice for budget-conscious buyers, as it holds a 46% advantage in MSRP. Those who do not require the extra space can benefit from the cost efficiency provided by the smaller drive while still meeting the baseline requirements of the comparison.