The 3D printing they do for aerospace engine parts is certainly very much different from how most metal 3d printing is done. Because the requirements are completely different, and the budgets that aerospace have available to them are insanely much bigger.
Right now you can print aerospace quality parts on hardware that's designed for marine grade parts, which we did by testing them to failure.
The only reason why the price is higher for aerospace is that you need to certify the machines and the environment in which they work and that costs an arm and a leg.
