WDS200T2B0C [WD Blue SN550 NVMe SSD（2TB & 1TB M.2(2280) PCIe Gen3 x4 NVMe 900TBW 5-year warranty 5年保証）] ＆ Western Digital BLACK Western Digital SN850 2TB & 1TB PCIe Gen4 NVMe (Read up to 7,000MB / sec) Built-in SSD WDS200T1X0E-EC [Domestic authorized distributor]

WDS200T2B0C [WD Blue SN550 NVMe SSD（2TB M.2(2280) PCIe Gen3 x4 NVMe 900TBW　5-year warranty　 5年保証）]

PCIE's VER is 3.0, which is one older, but it also generates less heat, so it can be used without a heat sink. There seems to be almost no dissatisfaction with the speed. There are few defective products, and it seems that the manufacturer's support is solid, so there is a sense of bargain and it is a product that you can purchase with confidence.

PCIEのVERは3.0と一つ古いですが、発熱も低い為、ヒートシンク無しでも使えます。速度には不満もほとんど見られない様です。不良品も少なく、メーカーのサポートもしっかりとしている様ですので、お買い得感があり、安心して購入できる商品となっております。

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Western Digital Western　BLACK　Digital SN850 2TB PCIe Gen4 NVMe (Read up to 7,000MB / sec) Built-in SSD WDS200T1X0E-EC [Domestic authorized distributor]　

This is PCIE 4.0 and high speed.

こちらは、PCIE4.0と高速で御座います。