The Samsung 9100 Pro 4TB is the objective winner of this comparison, securing more spec victories than its counterpart. Its most significant advantage is a 99% improvement in sequential read performance, which provides a substantial boost in data access capabilities. While both drives share several identical specifications, the superior read speeds of the Samsung 9100 Pro 4TB establish it as the more capable hardware option for users prioritizing raw data throughput.

Users who require the fastest possible sequential read speeds for their storage tasks should choose the Samsung 9100 Pro 4TB. Conversely, the Samsung 990 Pro 4TB is the better selection for budget-conscious buyers, as it offers a 28% advantage in MSRP. By weighing the necessity of high-speed data retrieval against the cost-saving benefits of the lower MSRP, consumers can select the drive that best aligns with their specific performance requirements and financial constraints.