ALWAYS get the Pro. It's the only Apple computer with actually good value. Get an older one if you're budget-conscious; 14" M1 or something.
The difference between atrociously slow low-res panel of MB Air and 120 Hz mini-LED of MB Pros is stark; everything else does not matter, including weight, ports or whatever.
The fact that people see the Air as a low-end MBP is a horrible mistake. What MBP should I buy if my eyes need at least a 15’’ display and I’m always travelling? Should I carry 2.1kg with me? Come on! What kind of “higher standard” is the heavy 16’’ MBP when you need to use it on the go?
Apple is to blame here, because the Air was expensive when it was introduced (the low end at that time was the plain “MacBook”), but they decided to remove the MacBook and make the Air cheaper. That was bad, because cheaper means it cannot innovate in weight anymore (in fact the Air keeps the same weight it had 15 years ago, while the rest of the industry has innovated with lighter laptops that are expensive and not perceived as “low end” by the public).
I would like that the plain MacBook was reintroduced, moving the Air back into the prosumer zone that it should have never left, and innovating with it by making it lighter and lighter. I don’t want thin, Apple, I hate that trend. I want ultralight. If thin is a side effect of being light, that’s fine, but the goal is the weight, not the thickness.
Edit: If there was a 15’’ Air with a weight of 1.2kg at >$3000 I’d order it just now. The problem is that the 15’’ Air, while very cheap, weights 1.51kg, which is almost the same as the 1.6kg of a 15’’ MBP of 2018 (modern 16’’ MBPs are 2.1kg, but that’s another story). An Air that has the same weight as an older MBP of the same size is not an Air. But that’s the consequence of marketing it as low end rather that an innovating product.