Given both are more expensive than grass, and it makes sense that an airport would want something other than grass to land on, why not make the two expensive types considered equally of quality?
Personally, I love Asphalt more than Concrete. It’s easier on the eyes, and lets you see all the nice details such as taxiway lights. Concrete… is just too bright, and when given the option, I just use Asphalt because I like how it looks, but unfortunately, it also lowers your commercial rating!
Really, I just make my GA out of Concrete so they stop complaining and I don’t have to look at it, then leave my commercial area Asphalt.