The Western Digital WD Black SN850X 8TB NVMe SSD is the objective winner of this comparison, securing five out of seven total specification victories. Its most significant advantage is its storage capacity, which is 300% greater than that of the alternative. While the Western Digital WD Black SN770 2TB holds its own in one category and ties in another, it cannot match the superior technical specifications offered by the higher-capacity model across the majority of the measured fields.

Users who require maximum storage space for extensive libraries should choose the Western Digital WD Black SN850X 8TB NVMe SSD to leverage its massive capacity advantage. Conversely, the Western Digital WD Black SN770 2TB is the better choice for budget-conscious buyers, as it provides an 85% better MSRP. Select the former for high-capacity requirements or the latter if your primary goal is to minimize the initial cost of your storage purchase.