I personally think the comparisons should stay within the Air family (or previous gen MBPs). You're never going to be happy if you're comparing against MiniLED HDR displays.
My M2 Air just arrived today, haven't had much of a chance to set it up and play around yet as it is a busy work day. But, I did do a side by side comparison to my M1 Air and the M2's display is noticeably nicer to the eye right out of the box, even before correcting Apple's signature green/blue tinted factory calibration.
I set both displays to default settings, turned TrueTone off, auto-brightness off, and set brightness to the 50% mark on each and the M2 Air's display has cleaner more solid whites (if that makes sense), better blacks, more contrast, and has a more pleasing overall tone compared to the M1.
Of course, when you crank up the brightness, the difference will be night and day due to the extra nits alone, but I think the takeaway here is that the M2 Air's display is an upgrade over the M1 Air's display (and the slightly larger size and thinner bezels are just icing on the cake).