It is pointed out that the 256GB model of MacBook Air with M2 is 'slower transfer speed than MacBook Pro with M1' - GIGAZINE
Indmem Ssd M2 Nvme M.2 256gb 512gb 1tb Ssd Pcie For Mac/macbook Air/macbook Pro Ssd Nvme Hard Drive 3x4 3d Nand Ssd For Apple - Solid State Drives - AliExpress