I didn't use a keyboard cover on my m1 at all and had no issues, but I feel like with this keyboard I can clearly see every single speck of dust stuck on the keyboard
Colorwise, it should be the same on the keys, but it's easier to see between the keys now with the new black background. It's possible the material attracts dust more than before, but I haven't noticed that.
I get the feeling dust gets into the keys. They just dont hit that smooth unless I put it upside down and blow into keys. I do notice I have to wipe screen and keys every 1-2 days with a microfiber because I can see dust.