Yes, they correspond. Currently FF Nightly is 6. That will become Aurora 6, then Beta 6, and then Firefox (final) 6. The features in all of those should be the

Yes, they correspond. Currently FF Nightly is 6. That will become Aurora 6, then Beta 6, and then Firefox (final) 6. The features in all of those should be the same, except that we might fix some bugs along the way and/or disable some features if they are not stable enough after testing. No new code is landed on Aurora, Beta or final, except for those fixes and possible disablings.