You have that quite backwards, IMHO. The bowie knife was designed as a fighting knife with all other uses secondary to that goal. The khukuri on the other hand was designed as primarily a farming instrument with it's goal as a fighting knife secondary.
For eons the khukuri has chopped everything from hardwoods to jungle vegetation, cleared hundreds of thousands of miles of farmland, dug holes, processed game and prepared food for dinner. It has served in civil actions to all out war and has come thru it all with outstanding results and honor.
Yes they are both outstanding designs....But the khukuri stands head and shoulders above the bowie in terms of usefulness and versatility, IMHO.