Samsung - T9 Portable 2TB vs SK hynix - Platinum P51 2TB
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Samsung - T9 Portable 2TB | SK hynix - Platinum P51 2TB |
|---|---|---|
| Sequential read | 2000 MB/s | 14700 MB/s |
| Sequential write | 1950 MB/s | 13400 MB/s |
| Interface | USB 3.2 Gen 2x2 | PCIe 5.0 x4 |
Between the T9 Portable 2TB and Platinum P51 2TB, the T9 Portable 2TB comes out ahead in interface, while the Platinum P51 2TB wins on sequential read / sequential write. Overall, the T9 Portable 2TB scores 64.1 and the Platinum P51 2TB scores 85.4 on our Mars Score.
Which should you buy?
The Platinum P51 2TB is the clear pick on raw spec strength, leading by 21.3 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 T9 Portable 2TB if you care most about interface. The biggest gaps in its favor are interface. The single most decisive one: Interface: USB 3.2 Gen 2x2 (vs PCIe 5.0 x4).
Pick the Platinum P51 2TB if you care most about sequential read / sequential write. Its strongest claims are sequential read, sequential write. The single most decisive one: Sequential read — 635.00% more. 14700 MB/s vs 2000 MB/s.
Both ship with comparable capacity, endurance (tbw), so those specs do not separate the two — focus on the differences below.
Bottom line: the Platinum P51 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 - T9 Portable 2TB or SK hynix - Platinum P51 2TB?
SK hynix - Platinum P51 2TB leads the current Mars Score by 21.3 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 Samsung - T9 Portable 2TB if…
Samsung - T9 Portable 2TB has the measurable edge on interface.
Choose SK hynix - Platinum P51 2TB if…
SK hynix - Platinum P51 2TB has the measurable edge on read mbps, write mbps.
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 - T9 Portable 2TB wins
- ▲Interface: USB 3.2 Gen 2x2 (vs PCIe 5.0 x4).
Why SK hynix - Platinum P51 2TB wins
- ▲Sequential read — 635.00% more. 14700 MB/s vs 2000 MB/s.
- ▲Sequential write — 587.18% more. 13400 MB/s vs 1950 MB/s.
Spec comparison
Capacity
| Spec | Samsung - T9 Portable 2TB | SK hynix - Platinum P51 2TB |
|---|---|---|
| Capacity | 2000 GB | 2000 GB |
Performance
| Spec | Samsung - T9 Portable 2TB | SK hynix - Platinum P51 2TB |
|---|---|---|
| Sequential read | 2000 MB/s | 14700 MB/slead |
| Sequential write | 1950 MB/s | 13400 MB/slead |
| Interface | USB 3.2 Gen 2x2lead | PCIe 5.0 x4 |
| Form factor | Portable USBlead | M.2 2280 |
Endurance
| Spec | Samsung - T9 Portable 2TB | SK hynix - Platinum P51 2TB |
|---|---|---|
| Endurance (TBW)ⓘ | 1200 | 1200 |
| Warranty | 5 yrs | 5 yrs |