The SK Hynix Platinum P51 2TB is the objective winner of this comparison, securing victories in five out of seven measured specifications. Its most significant advantage over the competition is its storage capacity, which is 100% better than that of the Samsung 990 Pro 1TB. While the Samsung 990 Pro 1TB maintains a lead in MSRP with a 58% advantage, the superior capacity offered by the SK Hynix Platinum P51 2TB makes it the more capable drive overall.

Users who prioritize maximum storage space for large libraries or extensive file collections should choose the SK Hynix Platinum P51 2TB for its doubled capacity. Conversely, those who are strictly focused on the initial purchase cost will find the Samsung 990 Pro 1TB to be the more economical option. Selecting between these two drives depends entirely on whether your primary requirement is the expanded storage volume of the former or the lower MSRP of the latter.