The SK Hynix Platinum P51 1TB is the objective winner of this comparison, securing victories in five out of seven measured specifications. Its most significant technical advantage is its sequential write speed, which outperforms the alternative by 168 percent. This superior performance profile makes the drive a more capable option for tasks that rely heavily on rapid data writing, establishing it as the more robust choice for users prioritizing high-speed operations over total storage volume.

Choose the SK Hynix Platinum P51 1TB if your primary requirement is high-performance sequential writing for demanding workloads. Conversely, select the Western Digital WD Blue SN5000 4TB if your priority is maximum storage space, as it offers a 300 percent advantage in capacity. While the latter provides significantly more room for files, the former remains the better selection for users who need the specific speed benefits provided by its architecture.