The Lexar NM1090 Pro 2TB is the objective winner of this comparison, securing more individual specification victories than the Lexar Professional NM1090 Pro 1TB PCIe Gen5 NVMe M.2 SSD. While the 1TB model holds a 31% advantage in MSRP, the 2TB version provides a significantly more robust hardware profile. The most impactful advantage for the larger drive is its endurance, which is 243% better than the 1TB variant, ensuring superior longevity for intensive data operations.

Users prioritizing upfront affordability should select the Lexar Professional NM1090 Pro 1TB PCIe Gen5 NVMe M.2 SSD, as it offers a more favorable MSRP. Conversely, the Lexar NM1090 Pro 2TB is the better choice for power users and professionals who require high endurance for heavy write workloads. By opting for the 2TB model, these users gain a substantial increase in total bytes written capacity, making it the more reliable long-term investment for demanding storage environments.