Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Samsung - 870 EVO 1TB | Samsung - T9 Portable 2TB |
|---|---|---|
| Sequential write | 530 MB/s | 1950 MB/s |
| Sequential read | 560 MB/s | 2000 MB/s |
| Capacity | 1000 GB | 2000 GB |
| Endurance (TBW) | 600 | 1200 |
| Interface | SATA III | USB 3.2 Gen 2x2 |
Between the 870 EVO 1TB and T9 Portable 2TB, the 870 EVO 1TB comes out ahead in several specs, while the T9 Portable 2TB wins on sequential write / sequential read. Overall, the 870 EVO 1TB scores 43.5 and the T9 Portable 2TB scores 64.1 on our Mars Score.
Which should you buy?
The T9 Portable 2TB is the clear pick on raw spec strength, leading by 20.6 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.
The 870 EVO 1TB does not pull ahead on any single popular-comparison spec — its strengths sit in the spec-table groups rather than the headline advantages.
Pick the T9 Portable 2TB if you care most about sequential write / sequential read. Its strongest claims are sequential write, sequential read, capacity, among others. The single most decisive one: Sequential write — 267.92% more. 1950 MB/s vs 530 MB/s.
There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.
Bottom line: the T9 Portable 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: Samsung - 870 EVO 1TB or Samsung - T9 Portable 2TB?
Samsung - T9 Portable 2TB leads the current Mars Score by 20.6 points.The more useful decision is the trade-off behind that result: compare capacity, sequential read, sequential write, interface against the way you will actually use the product.
Choose Samsung - 870 EVO 1TB if…
Samsung - 870 EVO 1TB does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
Choose Samsung - T9 Portable 2TB if…
Samsung - T9 Portable 2TB has the measurable edge on write mbps, read mbps, capacity gb.
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 Samsung - 870 EVO 1TB wins
- No decisive advantages.
Why Samsung - T9 Portable 2TB wins
- ▲Sequential write — 267.92% more. 1950 MB/s vs 530 MB/s.
- ▲Sequential read — 257.14% more. 2000 MB/s vs 560 MB/s.
- ▲Capacity — 100.00% more. 2000 GB vs 1000 GB.
- ▲Endurance (TBW) — 100.00% more. 1200 vs 600.
- ▲Interface: USB 3.2 Gen 2x2 (vs SATA III).
Spec comparison
Capacity
| Spec | Samsung - 870 EVO 1TB | Samsung - T9 Portable 2TB |
|---|---|---|
| Capacity | 1000 GB | 2000 GBlead |
Performance
| Spec | Samsung - 870 EVO 1TB | Samsung - T9 Portable 2TB |
|---|---|---|
| Sequential read | 560 MB/s | 2000 MB/slead |
| Sequential write | 530 MB/s | 1950 MB/slead |
| Interface | SATA III | USB 3.2 Gen 2x2lead |
| Form factor | 2.5" SATA | Portable USBlead |
Endurance
| Spec | Samsung - 870 EVO 1TB | Samsung - T9 Portable 2TB |
|---|---|---|
| Endurance (TBW)ⓘ | 600 | 1200lead |
| Warranty | 5 yrs | 5 yrs |