I went for the space black, mainly because I have a space grey M1 MacBook Air too (that my wife will now be getting) so fancied a bit of a change. I quite like the colour
Lighting in this room is a bit dim, but here's space black vs space grey:
Have to say that even that base spec M1 Air was doing a fine job for my usage, I just fancied a slightly bigger screen and my wife benefits as she's still using my old 2013 MacBook Pro at the moment which has a ruined battery as you'd expect.
Also as
@Trifid mentioned, the speakers are quite a surprise - especially after being used to the Air's speakers for so long. I'm sure those who have had a 16" 2019 or later MacBook Pro will know what to expect, but it does sound significantly better.