The Western Digital WD Black SN8100 4TB is the objective winner of this comparison, securing four out of six total specification categories. Its most significant advantage is its sequential read speed, which outperforms the Samsung 870 EVO 500GB by 2561 percent. While the Samsung 870 EVO 500GB holds a 93 percent advantage in MSRP, the superior performance metrics of the Western Digital WD Black SN8100 4TB make it the more capable drive across the majority of measured technical fields.

Users prioritizing maximum storage capacity and high-speed data access should choose the Western Digital WD Black SN8100 4TB for their system. Conversely, the Samsung 870 EVO 500GB is the better option for budget-conscious buyers who do not require the extreme read speeds offered by the alternative. Selecting between these two drives depends entirely on whether your primary requirement is the significant cost savings provided by the Samsung or the substantial performance gains offered by the Western Digital.