The B-2 is essentially a flying wing design whereas the F-117A is a lifting body/high-swept delta wing design.
The B2 is closer to the Horten design philosophy.
NASA Dreyden Centre -
Lift Body
NASA - NASA Dryden Fact Sheet - Lifting Bodies
Lifting body - Wikipedia, the free encyclopedia
YouTube - NASA X-craft -The Lifting Bodies
YouTube - Lifting Bodies
Horten Stealth
Possibly true or at the very least a beneficial artefact of the flying wing design concept!
"Myhra, David. Northrop Tests Hitler's 'Stealth' Fighter."
Aviation History, Volume 19, Issue 6, July 2009.
Stealth technology
Reiman Horton said he mixed charcoal dust in with the wood glue to absorb electromagnetic waves (
radar), which could have shielded the aircraft from detection by British early warning ground-based radar known as
Chain Home. This application was tested by Northrop-Grumman in early 2009 and found to have been successful, making the Ho-229 the first aircraft to successfully incorporate "
stealth technology" in its design.
Myhra site pre radar test.
David Myhra - Present & Future Publications