Never tried a bushman.  My own personal " pack knife"  is an Incolma machete with the blade cut down to 12".  Doesn't weigh much and it stays strapped to the side of whatever pack I'm carrying.  Being  a light, thin blade means it cuts like crazy, but is no " chopper"  on the thick, hard stuff.  Ontario makes a 12"  machete that most people seem to like for exactly that use.  Then again, the bushman may accomplish the same thing. I've no idea which is heavier or cuts better.