The MBP I had still had the same issues as the Air, although the redness was the opposite side. Didn't notice it in normal use just like I don't notice it on the MBA under normal use. My previous 2020 i5 MBP didn't have a perfect screen either, light bleed and uniformity issues.
The MBP definitely has its fair share of screen issues so I wouldn't go for the MBP just to avoid a problem that actually doesn't really exist, unless you look at your screen at full brightness in a pitch black room and then take a photo of it!
If you get a MBA and there is is a problem with the screen when using it in normal conditions, take it back. That also goes for the MBP too.
Im not trying to say some people in this thread don't have a problem, I just think if this was a wide spread enough of a problem, to the point that you should avoid buying a MBA, this thread would have hundreds, if not thousands of replies and examples of it.