The Samsung 9100 Pro 4TB is the objective winner of this comparison, securing four out of six spec victories. Its most significant advantage is its sequential read speed, which is 2543% better than the alternative. While the Samsung 870 EVO 500GB remains competitive in terms of MSRP, offering a 92% better value in that specific category, it cannot match the substantial performance lead established by the higher-capacity drive across the majority of the measured technical specifications.

Users who prioritize raw data throughput and maximum storage capacity should choose the Samsung 9100 Pro 4TB for their system. Conversely, the Samsung 870 EVO 500GB is the logical selection for budget-conscious builders who require a reliable storage solution and do not need the extreme sequential read capabilities provided by the larger drive. Selecting between these two components depends entirely on whether your primary requirement is high-end performance or a more accessible entry price.