I bought an SSD for my M1 Air and the read and write speed is only at around 680MB/s while on my sister's Macbook Pro Intel 2020 it's around 920MB/s. Is this
Apple MacBook AIR 13 2020, A2337, M1, 8 Gb RAM, SSD 256 Gb
Amazon.co.jp: 2020 Apple MacBook Air ノートパソコン: Apple M1 Chip、13インチ、8GB RAM、256GB SSD、バックライトKeyboard、FaceTime HDカメラ、Touch ID、iPhoneとiPadに対応 - スペースグレイ : Computers