SanDisk - Extreme PRO 2TB (Portable) 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 | SanDisk - Extreme PRO 2TB (Portable) | SK hynix - Platinum P51 2TB |
|---|---|---|
| Sequential read | 2000 MB/s | 14700 MB/s |
| Sequential write | 2000 MB/s | 13400 MB/s |
| Endurance (TBW) | 2000 | 1200 |
| Interface | USB 3.2 Gen 2x2 | PCIe 5.0 x4 |
Between the Extreme PRO 2TB (Portable) and Platinum P51 2TB, the Extreme PRO 2TB (Portable) comes out ahead in endurance (tbw) / interface, while the Platinum P51 2TB wins on sequential read / sequential write. Overall, the Extreme PRO 2TB (Portable) scores 64.2 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 21.2 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 Extreme PRO 2TB (Portable) if you care most about endurance (tbw) / interface. The biggest gaps in its favor are endurance (tbw), interface. The single most decisive one: Endurance (TBW) — 66.67% more. 2000 vs 1200.
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, 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: SanDisk - Extreme PRO 2TB (Portable) or SK hynix - Platinum P51 2TB?
SK hynix - Platinum P51 2TB leads the current Mars Score by 21.2 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 SanDisk - Extreme PRO 2TB (Portable) if…
SanDisk - Extreme PRO 2TB (Portable) has the measurable edge on tbw, 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 SanDisk - Extreme PRO 2TB (Portable) wins
- ▲Endurance (TBW) — 66.67% more. 2000 vs 1200.
- ▲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 — 570.00% more. 13400 MB/s vs 2000 MB/s.
Spec comparison
Capacity
| Spec | SanDisk - Extreme PRO 2TB (Portable) | SK hynix - Platinum P51 2TB |
|---|---|---|
| Capacity | 2000 GB | 2000 GB |
Performance
| Spec | SanDisk - Extreme PRO 2TB (Portable) | SK hynix - Platinum P51 2TB |
|---|---|---|
| Sequential read | 2000 MB/s | 14700 MB/slead |
| Sequential write | 2000 MB/s | 13400 MB/slead |
| Interface | USB 3.2 Gen 2x2lead | PCIe 5.0 x4 |
| Form factor | Portable USBlead | M.2 2280 |
Endurance
| Spec | SanDisk - Extreme PRO 2TB (Portable) | SK hynix - Platinum P51 2TB |
|---|---|---|
| Endurance (TBW)ⓘ | 2000lead | 1200 |
| Warranty | 5 yrs | 5 yrs |