Thread:RealGameTime/@comment-43749745-20190907042332

The only advantage Aperture had was with AI(pretty big ngl) and the handheld portal gun. Black Mesa had advantages in every other area, even going as far as being able to study extradimensional life and going to Xen. Now, I get it that Black Mesa was basically government run and Aperature wasn't. But Aperature could have done that if they wanted to, by "that" I mean the Portals to Xen. However, funding might have been the issue. We don't what was on the Borealis, but something with portals(lol) and thats why the Combine is looking for it. It has also been hinted that Black Mesa also created military hardware.

Aperature has a Portal Gun

Black Mesa has a dimensional gun, if charged enough it sent the person holding it to another dimension. 