Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Lexar - NM800 Pro 2TB | Samsung - 9100 PRO 2TB |
|---|---|---|
| Sequential write | 6500 MB/s | 13400 MB/s |
| Sequential read | 7500 MB/s | 14800 MB/s |
| Endurance (TBW) | 1500 | 1200 |
| Interface | PCIe 4.0 x4 | PCIe 5.0 x4 |
Between the NM800 Pro 2TB and 9100 PRO 2TB, the NM800 Pro 2TB comes out ahead in endurance (tbw), while the 9100 PRO 2TB wins on sequential write / sequential read. Overall, the NM800 Pro 2TB scores 68.8 and the 9100 PRO 2TB scores 85.4 on our Mars Score.
Which should you buy?
The 9100 PRO 2TB is the clear pick on raw spec strength, leading by 16.6 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the NM800 Pro 2TB if you care most about endurance (tbw). The biggest gaps in its favor are endurance (tbw). The single most decisive one: Endurance (TBW) — 25.00% more. 1500 vs 1200.
Pick the 9100 PRO 2TB if you care most about sequential write / sequential read. Its strongest claims are sequential write, sequential read, interface. The single most decisive one: Sequential write — 106.15% more. 13400 MB/s vs 6500 MB/s.
Both ship with comparable capacity, so those specs do not separate the two — focus on the differences below.
Bottom line: the 9100 PRO 2TB is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Lexar - NM800 Pro 2TB or Samsung - 9100 PRO 2TB?
Samsung - 9100 PRO 2TB leads the current Mars Score by 16.6 points.The more useful decision is the trade-off behind that result: compare sequential read, sequential write, interface against the way you will actually use the product.
Choose Lexar - NM800 Pro 2TB if…
Lexar - NM800 Pro 2TB has the measurable edge on tbw.
Choose Samsung - 9100 PRO 2TB if…
Samsung - 9100 PRO 2TB has the measurable edge on write mbps, read mbps, interface.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Lexar - NM800 Pro 2TB wins
- ▲Endurance (TBW) — 25.00% more. 1500 vs 1200.
Why Samsung - 9100 PRO 2TB wins
- ▲Sequential write — 106.15% more. 13400 MB/s vs 6500 MB/s.
- ▲Sequential read — 97.33% more. 14800 MB/s vs 7500 MB/s.
- ▲Interface: PCIe 5.0 x4 (vs PCIe 4.0 x4).
Spec comparison
Capacity
| Spec | Lexar - NM800 Pro 2TB | Samsung - 9100 PRO 2TB |
|---|---|---|
| Capacity | 2000 GB | 2000 GB |
Performance
| Spec | Lexar - NM800 Pro 2TB | Samsung - 9100 PRO 2TB |
|---|---|---|
| Sequential read | 7500 MB/s | 14800 MB/slead |
| Sequential write | 6500 MB/s | 13400 MB/slead |
| Interface | PCIe 4.0 x4 | PCIe 5.0 x4lead |
| Form factor | M.2 2280 | M.2 2280 |
Endurance
| Spec | Lexar - NM800 Pro 2TB | Samsung - 9100 PRO 2TB |
|---|---|---|
| Endurance (TBW)ⓘ | 1500lead | 1200 |
| Warranty | 5 yrs | 5 yrs |