Given they both have the A14 chip and seemingly no other differences in their innards, the fact the pro can do 60fps Dolby digital vs the regular phones 30fps feels like a lame software lock?
If it wasn't about the money and just about the environment Apple would let you walk in to one of their stores with your serial number in hand and pick one up for free if you needed one (one per person)...
They built it, it's really not that difficult. The sky, view through window and trees around it look like they were added after. The top floor may have been a seperate piece perhaps.