I'm going to come at this from the perspective of hunting/camping/fishing. Ka-bar.
Why- It is good for gutting (As for slicing open and shape is more convenient for cutting around inside the cuts) as well as being adaptable to a filleting knife. The Khukuri is much worse at filleting. Any knife of that shape is. There's a very specific skill required to fillet with that thing. (yes I called it a thing). The Kabar is a good... multi-tool. It's functional for lots of different things whereas the Khukuri just... looks cool.
The Khukuri is most effective as a weapon- used in an attack or as slicing a throat.....
http://en.wikipedia.org/wiki/Khukuri <- I found this to go with what I'm saying.
Looks cool vs functional.
The Ka-bar= The knife's success can be attributed to its balance of weight, length, and price. <- taken from Wiki again. It is definetly a more practical blade.
They both are cool so it's LCF+Practical V.S LCF+Slice a man open....
Your call...
Megan