I’ve got to say after comparing photo’s of yours and theirs back to back there isn’t a lot of difference. When I first looked at their screens I thought they had added features that yours didn’t have, the walled enclosure, the solar panels and the terminal waiting room area, along with real people models.
Now looking at yours, I can see from the screens that you have those features too, I just had never gone around to the back of the airport or gone inside the terminal before.
It shows just how accurate your version is. I’ve alway bought every payware airport that comes up in the south of England, as that’s where I fly almost exclusively, but yours might just be better overall so I might give this a miss.