In case you didn't see my "2018 Retina Return Saga"... there it is. I was very pleased with the new Air I originally had until the "hardware" issue started. It's replacement had a noticeably dim screen. I returned that one the next day and I'm typing on it's replacement. The configuration I needed on the Pro to match the Air I had would have cost me approx $400 more (I would have gotten the touch bar pro since at the time it had the newest updates). I couldn't justify the expenditure, but I did make up my mind that if this 3rd one was also dull... I'd go back the next day and get the Pro.
L O N G story short... I'm once again super content with this 2018 Retina MacBook Air, but in retrospect, since there seems to be such a disparity in screen quality (or whatever it is), if I were shopping now, I'm not sure I'd go through that again. I think I'd just get the Pro and be done with it. Good Luck. Let us know what you decide to do.