Bingowings said:

one is a space truck and looks dingy and older and the other is a science vessel/corporate ambassadorial/store window ship and looks flashy and new.

My car probably has the same technology as the finest limousines used to cater to diplomats and I would bet garbage trucks do as well. Technology isn't limited to dog & pony show vehicles. It's driven by cost of manufacture, cost of maintenance, and usability.

I understand this isn't a primer for Alien, but you can't ignore the fact that it's dripping with Alien crossover. To me, it should look more consistent.