Thanks, that's good to know.Apple claims twice the speed which seems reasonable if they are keeping the same NAND chips used on my M1 Mac mini. Not only is the M1 SSD fast it hits amazing speeds with low threads and small file sizes which (IME) is a big reason why the M1 machines feel so snappy and need for more swap isn't as noticeable.
EDIT: I went back and checked, "up to 2X" the SSD speed. Still should be a big jump on top of GPU, CPU, and everything else.