The Western Digital WD Black SN850X 1TB wins in 3 out of 5 comparable specs. Its biggest advantage is Sequential Read (3846% better).
WD Red Plus 4TB wins in 1 spec (Capacity: 300% better).
Recommendation
Choose WD Black SN850X 1TB if you want the best overall performance — especially sequential read.
Choose WD Red Plus 4TB if capacity matters more to you.
| Spec | Western DigitalWD Black SN850X 1TB | Western DigitalWD Red Plus 4TB |
|---|---|---|
| Storage | ||
| Capacity | 1000 GB | 4000 GB+300% |
| Type | NVMe SSD | HDD |
| Interface | PCIe Gen4 x4 | SATA 6 Gb/s |
| Form Factor | M.2-2280 | 3.5" |
| NAND Type | TLC | N/A |
| Performance | ||
| Sequential Read | 7,300 MB/s+3846% | 185 MB/s |
| Sequential Write | ||
| 6,300 MB/s+3305% |
| 185 MB/s |
| Endurance (TBW) | 600 | N/A |
| Features | ||
| DRAM Cache | Yes | Yes |
| Platform | ||
| Controller | WD in-house | N/A |
| PCIe Gen | 4 | N/A |
| Price | ||
| MSRP | $80−20% | $100 |
| Release Date | Aug 2022 | Jun 2020 |
