The Lexar NM1090 Pro 2TB is the objective winner of this comparison, securing more total spec victories than its competitor. Its most significant advantage is its sequential read speed, which outperforms the Samsung 990 Pro 4TB by 88 percent. This substantial lead in read performance establishes the Lexar NM1090 Pro 2TB as the superior choice for users prioritizing raw data access speeds over total storage volume.

Users who require the fastest possible sequential read performance should select the Lexar NM1090 Pro 2TB for their system. Conversely, the Samsung 990 Pro 4TB is the better option for those who prioritize storage space, as it offers 100 percent more capacity than the alternative. Choosing between these two components depends entirely on whether your primary requirement is the high-speed data retrieval provided by the Lexar or the doubled storage capacity offered by the Samsung.